Relevant bibliographies by topics / Circular antenna

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Circular antenna'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Circular antenna"

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Eardprab, Sanchai, Chuwong Phongcharoenpanich, and Danai Torrungrueng. "Improvement of a Circular Microstrip Antenna Excited by Four Feeds and Suspended with Artificial Magnetic Conductors." International Journal of Antennas and Propagation 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/310686.

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The proposed antenna is a circular microstrip structure excited by four feeds and suspended with artificial magnetic conductors (AMCs). The multifeed circular microstrip antennas can generate a high circularly polarized performance by using a different feed arrangement. AMC structures with a square, circular, or octagonal patch on a unit cell are designed and applied to circular microstrip patch antennas for the enhancement of antenna performance. It is found that simulated results of the proposed antenna are well suited. The properties of wide beamwidth with good axial ratio can be achieved when applying the proposed AMC structures to circular microstrip antennas. The antenna prototype was fabricated to validate simulated results.
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Squadrito, Paolo, Patrizia Livreri, Loreto Di Donato, Concetto Squadrito, and Gino Sorbello. "A Telemetry, Tracking, and Command Antennas System for Small-Satellite Applications." Electronics 8, no. 6 (June 18, 2019): 689. http://dx.doi.org/10.3390/electronics8060689.

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Circularly polarized (CP) antennas are used in space applications for telemetry tracking and command (TT&C). In this paper, we present an antenna for a TT&C system that can employ only four antennas to achieve a wide quasi-isotropic coverage. The proposed single-feed circular polarized annular patch antenna is low profile and compact. It exhibits a wide impedance bandwidth of 19.7%, wide-angle circular polarization with an on-axis maximum gain higher than 6 dBi and an axial ratio below 4 dB in the frequency band 2.0–2.3 GHz. The developed low-cost antenna can be used for small-satellite data downlink where only two right hand circular polarized (RHCP) antennas and two left hand circular polarized (LHCP) antennas would be required since each antenna has an adequate CP gain on a wide angle. A prototype antenna has been fabricated and measured. The experimental validation shows a good agreement of the measured impedance bandwidth, axial ratio, and far-field pattern with the ones predicted by numerical full-wave study.
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Zainud-Deen, S., S. Abd Elhamied, and H. Abd El-Azem Malhat. "Integrated Millimeter-Wave Antennas for On-Chip Communication." Advanced Electromagnetics 5, no. 1 (March 12, 2016): 22. http://dx.doi.org/10.7716/aem.v5i1.333.

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This paper introduces the design and analysis of circularly polarized (CP) and dual-polarized on-chip microstrip antennas for wireless communication at 60 GHz. The CP on-chip antenna consists of a circular aluminum patch with two overlapped circular slots fed by the transmission line. The radiation characteristics of the CP have been analyzed using the finite integration technique and finite element method based electromagnetic solvers. The CP antenna introduces left-hand circular polarization and employs as on-chip transmitter. A design of dual-polarized on-chip microstrip antenna at 60 GHz is investigated and is employed as on-chip receiver. The dual ports of the dual polarized antenna are designed with high isolation between them in order to be used as a two on-chip receivers. The radiation characteristics of the dual-port antenna have been calculated. The effect of the separation distance between the CP-antenna and the dual-polarized antenna on the same chip has been investigated. The performance parameters like the reflection coefficient, transmission coefficient, and the transmission gain of the two antennas at different separation distances have been introduced.
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Prof. Romi Morzelona. "Evaluation and Examination of Aperture Oriented Antennas." International Journal of New Practices in Management and Engineering 6, no. 01 (March 31, 2017): 01–07. http://dx.doi.org/10.17762/ijnpme.v6i01.49.

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The exhaustive evaluation and analysis of aperture oriented antennas for different dimensions at two different frequencies (1800 MHz and 2.4 GHz) is presented in this paper. Design and comparison of the antennas for their performance is done through MATLAB. It is inferred that the circular aperture antenna has 95% higher directivity than rectangular aperture antenna. In addition, for the circular aperture antenna HPBW is 0.2849 degrees and for rectangular aperture HPBW is 1.0143 degrees. Also, circular patch antenna has less side lobe power than that of rectangular aperture antenna.
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Hajlaoui, El Amjed, and Ziyad Almohaimeed. "Analysis and Development of an Efficient Cross-Slot Loaded Compact Electromagnetic Band Gap Antenna." Applied Computational Electromagnetics Society 36, no. 6 (August 6, 2021): 734–39. http://dx.doi.org/10.47037/2020.aces.j.360615.

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This paper is devoted to a novel Electromagnetic Band Gap (EBG) single-feed circularly polarized microstrip EBG antenna with compact size proposed for C-Band applications. The antenna structure will include eight slits introduced at the boundary and the corners in the radiating square patch with a cross-slot at the center. The provided study will effectively approve the various proposed structures and interest occupied by these types of antennas in the enhancement of output parameters (gain, directivity, radiation efficiency, and bandwidth) without much affecting the operating bandwidth at C-band. At first, the concept and the realization of a directive and circularly polarized antenna using an electromagnetic band gap material whose circular polarization is generated by the structure itself is discussed. The analysis and simulation results are presented for an antenna operating at 6.1 GHz using computer Simulation Technologies (CST). Furthermore, the new compact circular polarized EBG antenna, compared to experimental results, will confirm the pre-studied goal of these kinds of antennas such as radiation efficiency, polarization purity, radiation efficiency, high directivity, and gain.
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Ghorbani, Mehdi, and Habib Ghorbaninejad. "A Novel Ultrawideband Gear-Shaped Dielectric Ring Resonator Antenna." Mathematical Problems in Engineering 2021 (July 12, 2021): 1–8. http://dx.doi.org/10.1155/2021/8069873.

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In this study, a novel ultrawideband (UWB) dielectric ring resonator (DRR) antenna has been proposed. DRR antennas include a single monopole antenna in the center of a ground plane and a dielectric with a symmetric structure around the monopole. This structure will lead to ultrawide band antenna. However, it is still possible to enhance the antenna bandwidth. In this study, we combine the DRR structure with an array antenna. The proposed antenna includes a circular array of four triangle resonators, which is rotated around the center of the triangle base to form a gear-shaped ring resonator antenna. In this design, characteristics of all these antennas are combined to enhance the antenna bandwidth including triangular dielectric resonator, circular array antenna, dielectric ring resonator structure, and a quarter-wave electric monopole. Triangular dielectric resonator antennas are wideband and in small size. Ring resonator antennas are inherently ultrawideband. Quarter-wave electric monopole and circular array structure can also enhance antenna bandwidth. This novel shape of the DRR antenna possesses the wider impedance bandwidth compared to similar works. Impedance bandwidth is 150% (5.2–36.1 GHz), and the bandwidth ratio is 1 : 6.9, which is much greater than earlier reports.
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Khandelwal, Mukesh Kumar, Binod Kumar Kanaujia, Santanu Dwari, Sachin Kumar, and Anil Kumar Gautam. "Triple band circularly polarized compact microstrip antenna with defected ground structure for wireless applications." International Journal of Microwave and Wireless Technologies 8, no. 6 (March 12, 2015): 943–53. http://dx.doi.org/10.1017/s1759078715000288.

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Asymmetric slits loaded irregular shaped microstrip patch antenna with three different ground structures is proposed. All three antennas show triple band characteristics. First antenna with regular ground plane resonates at 1.95, 2.4, and 4.90 GHz with good radiation characteristics and shows right-hand circular polarization at 1.95 GHz. 18.75% of compactness is achieved with triple band characteristics. Further, same patch is used with different defected ground structures. Second antenna resonates at 1.85, 2.4, and 4.85 GHz with suppressed cross-polarization level and antenna shows right-hand circular polarization at 1.85 and 4.85 GHz. Compactness is further improved to the value of 22.91%. The third antenna resonates at 1.95, 2.4, and 4.85 GHz with better gain and radiation characteristics and antenna shows right-hand circular polarization at 1.95 and 2.4 GHz. The small frequency ratio f2/f1 is achieved and the value of f2/f1 is 1.29 and 1.23 for second and third configuration, respectively. Proposed structures show right-hand circularly polarized with suppressed left-hand circularly polarized radiations and suitable for fixed mobile wireless communication applications. All structures are analyzed using Ansoft HFSS v.14 based on finite element method and measured results satisfy the simulated results.
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Sabban, Albert. "New Compact Wearable Metamaterials Circular Patch Antennas for IoT, Medical and 5G Applications." Applied System Innovation 3, no. 4 (October 8, 2020): 42. http://dx.doi.org/10.3390/asi3040042.

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The development of compact passive and active wearable circular patch metamaterials antennas for communication, Internet of Things (IoT) and biomedical systems is presented in this paper. Development of compact efficient low-cost wearable antennas are one of the most significant challenges in development of wearable communication, IoT and medical systems. Moreover, the advantage of an integrated compact low-cost feed network is attained by integrating the antenna feed network with the antennas on the same printed board. The efficiency of communication systems may be increased by using efficient passive and active antennas. The system dynamic range may be improved by connecting amplifiers to the printed antenna feed line. Design, design considerations, computed and measured results of wearable circular patch meta-materials antennas with high efficiency for 5G, IoT and biomedical applications are presented in this paper. The circular patch antennas electrical parameters on the human body were analyzed by using commercial full-wave software. The circular patch metamaterial wearable antennas are compact and flexible. The directivity and gain of the antennas with Circular Split-Ring Resonators (CSRR) is higher by 2.5dB to 3dB than the antennas without CSRR. The resonant frequency of the antennas without CSRR is higher by 6% to 9% than the antennas with CSRR. The computed and measured bandwidth of the stacked circular patch wearable antenna with CSRR for IoT and medical applications is around 12%, for S11 lover than −6dB. The gain of the circular patch wearable antenna with CSRR is around 8dBi.
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Jiang, Guo Xing. "The Design of Dual Band Circularly Polarized Patch Antenna for Civilian GPS Applications." Applied Mechanics and Materials 397-400 (September 2013): 1967–71. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.1967.

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Antenna is all important part of GPS receivers，there is a great need for the design and production of new antennas which are fully compatible with modernized signals. Because of their advantages such as low cost, compact size, low profile，ability to support dual-frequency and circular polarization operation, microstrip patch antennas have become widely used in GPS antenna designs. A circular polarization patch antennas are proposed in the paper. The antenna designed to operate at L1(1575.42MHz) and L5(1176.45MHz)frequency bands. Initially, a comer-truncated patch antenna for GPS L1 operation was designed to validate simulation in Ansoft High Frequency Structure Simulator(HFSS), the results obtained for this antenna were used to design the two proposed antennas,and designed antennas are presented．
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Nalanagula, Rajasekhar, Naresh K. Darimireddy, Runa Kumari, Chan-Wang Park, and R. Ramana Reddy. "Circularly Polarized Hybrid Dielectric Resonator Antennas: A Brief Review and Perspective Analysis." Sensors 21, no. 12 (June 15, 2021): 4100. http://dx.doi.org/10.3390/s21124100.

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Recently, it has been a feasible approach to build an antenna, in view of the potential advantages they offer. One of the recent trends in dielectric resonator antenna research is the use of compound and hybrid structures. Several considerable investigations have been already underway showing quite interesting and significant features in bandwidth, gain, and generation of circular polarization. A critical review on a journey of circularly polarized hybrid dielectric resonator antennas is presented in this article. A general discussion of circular polarization and DR antennas are provided at the forefront. Evolution, significant challenges, and future aspects with new ideas in designing hybrid dielectric resonator antennas are indicated at the end of the review. State-of-the-art advances and associated design challenges of circularly polarized hybrid DR antennas and related empirical formulas used to find resonance frequency of different hybrid modes produced are discussed in this paper.
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Dissertations / Theses on the topic "Circular antenna"

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Revankar, U. K. "Three-Layer Electromagnetically Coupled Circular Microstrip Antennas." Thesis, Indian Institute of Science, 1995. http://hdl.handle.net/2005/241.

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Presented in this thesis are the following experimental and theoretical investigations carried out on the three-layer electromagnetically coupled (EMC) circular microstrip antennas and their arrays. 1.Three-Layer EMC Circular Microstrip Antenna A three-layer EMC circular microstrip antenna consists of a probe-fed circular microstrip patch having two parasitically excited circular microstrip patches (without ground planes) stacked above it, with air gaps in between successive substrates. In the "inverted" configuration, the parasitic patches are on the lower (nearer to the driven substrate) surface of the substrate. An exhaustive experimental study of the resonant frequencies, input impedance, impedance bandwidth and radiation characteristics of this antenna, has been carried out for both the "normal" and the "inverted" configurations. Based on this experimental study, the design and optimisation of the antenna have been discussed and experimentally tested. In the S-band, it is found that an impedance bandwidth as high as 20 percent coupled with good patterns, high gain and low cross-polarisation levels, have been obtained. 2.Three-Layer EMC Circular Microstrip Antenna Arrays Experimental work has also been carried out on linear arrays of three-layer EMC circular microstrip antennas. The design of a linear array both in the E- and H- planes, of the three-layer microstrip antennas in their "normal" as well as "inverted" configurations, has been discussed and realisation carried out. Impedance bandwidths of the arrays have been experimentally found to be the same as that of the three-layer antenna element High gain and good pattern shape with sidelobes as well as cross-polarisation levels better than -20 dB through a scan angle of 40°, have been realised. A study of the mutual coupling between two-layer as well as three-layer EMC circular patch elements has also been carried out for the useful range of interelement spacings. 3.Theoretical Analysis of Resonant Frequencies of Multilayer Patch Structures Theoretical investigations have been carried out on the resonance properties of single-layer and multilayer EMC patch structures employing the full-wave analysis based on spectral domain immittance approach. The impedance Green's functions for all these structures have been derived from the combination of equivalent transverse transmission lines concept Galerkin's method is employed in the spectral (Hankel) transform domain where two sets of disk current expansions are used for obtaining die characteristic equation. By solving the characteristic equation, the resonant frequencies are obtained for various values of the parameters of the layered antenna.
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Huysamen, Johan Herman. "Electrically small planar antenna for circular polarization /." Link to the online version, 2007. http://hdl.handle.net/10019/1047.

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Huysamen, Johan Herman. "Electrically small planar antenna for circular polarization." Thesis, Stellenbosch : Stellenbosch University, 2006. http://hdl.handle.net/10019.1/1572.

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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2006.
The design of an electrically small planar antenna for compact circular polarization is presented. After an in-depth study of the performance limitations on electrically small antennas and an investigation into the working of various existing electrically small antennas, the design, simulation and measurement of the proposed antenna element is presented in detail.
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Edling, Thomas. "Design of circular polarized dual band patch antenna." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-174672.

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At the moment Swedish Transport Administration uses a monitor system that candetect urgent errors as warm ball-bearings and flat wheels etc. with stationarydetectors. To avoid these errors Swedish Transport Administration, UPWIS AB andUppsala University work with a system that will continuously monitoring the train todetect the errors as fast as possible. This will save money in the future for SwedishTransport Administration and all other partners that use the rails.Swedish Transport Administration has already RFID readers beside the rail to detecttrains position. The new monitoring system will use these readers and send data fromthe monitoring system via these readers to a database.The aim of this thesis work is to design and build a RFID antenna to send data fromthe monitoring system to the RFID readers. The antenna should be a circularpolarized and it needs to manage the harsh environment on the train.This thesis work started with a theoretical study which investigated four commonantenna types (dipole, loop, PIFA and patch/microstrip) to evaluate which antennatype that is the best solution for this application. It was decided to design a patchantenna from the theoretical study since it fulfils all the requirements for the antenna.Simulations and tests shows that the antenna is circular polarized and have amaximum reading distance of 5 m for 868 MHz. For 2.45 GHz it is linear polarizedand has a reading distance of at least 10 m. With other hardware settings the antennawill have longer reading distance at 2.45 GHz.When all parts of the test bed was finished the test bed was mounted on themeasurement wagon. The final test shows that the antenna fulfils the task. Theantenna transmitted the data from the sensor boxes to the RFID readers.The report suggests future work to minimize the reading distance and size for theantenna. These are: transfer sensor data to RFID tag by “multi hop”, hardwareimprovement for instance antenna diversity and using another substrate (higherdielectric constant).
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Lim, Eng G. "Circular polarised microstrip antenna design using segmental methods." Thesis, Northumbria University, 2002. http://nrl.northumbria.ac.uk/1330/.

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Research into the modelling and analysis of microstrip patch antenna have been reported in many studies. These include Transmission Line Modelling, Cavity Modelling, Coplanar Multiport Modelling and Full wave Modelling. Since the electromagnetic field elements are time harmonic, the phasor-form of the Maxwell field equations is used. In this thesis results are presented of the research that has been carried out into the segmental approach for the analysis of the microwave patch antennas. The segmental approach includes the "Segmentation" and the "Desegmentation" methods. In the segmentation method two distinct structural forms have been identified, cascade and shunt types. In the cascade type all consecutive segment elements share a common boundary, while for the shunt type, all appended segment elements have no common boundary. In the case of the shunt type structure a generalised input impedance matrix formula, for any number of appended segment elements, has been obtained. For the desegmentation method a generalised input impedance for any number of deleted segment elements, has been obtained. The above research studies have been applied in the design of a circular polarised two corner deleted square patch microstrip antenna with a single feed. For this structure the design involves both square and triangular patch geometries. The overall patch geometry for circular polarised is determined using perturbation analysis to determine the size of the deleted triangular segment elements. New computationally efficient impedance coupling expressions for the interconnecting port impedances on a rectangle, and, on a right angled isosceles triangle shaped antenna patch have been derived. In the determination of the input impedance of the overall antenna structure the coupling impedances constitute the elements of the individual segment coupling matrices. The matrices are used in a general multiport matrix circuit analysis to obtain the input impedance formula. It is established that, where applicable, the desegmentation method is computationally more efficient than the segmentation method. The new results obtained have been applied to the design of a corner deleted square patch antenna, and, the design procedure is fully described. The computer program implementation evaluates the perturbation quantity, and, the antenna input impedance. The structural properties of the coupling matrices, which are used for efficient computation, are described in detail. All the results from the above work show close agreement with full-wave software simulation and practical results. Significant research achievements: Both segmentation and desegmentation methods have been studied and it has been shown that the desegmentation approach, when applicable, is in general significantly more computationally efficient. In the segmentation method two structural forms, cascade and shunt have been identified. In the latter case a new generalised input impedance matrix formula has been obtained for any number of appended segment elements. A new generalised input impedance matrix formula has been obtained for any number of deleted segment elements in the desegmentation method. New computationally efficient expressions for the coupling impedances have been derived and used in test applications. New computationally efficient expressions for the offset input impedance of a linear polarised rectangular patch, and, an isosceles right-angled triangular patch have been derived and experimentally verified. A program implementing the design procedure for the corner-deleted truncated square patch circular polarised microstrip antenna has been constructed using MATHCAD programming.
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Nelakonda, Nikitha. "Design of Robust Superdirective Receiving Antenna Array for Circular, Hexagonal and Elliptical Geometries." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460984746.

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Kirik, Mustafa Sancay. "Design, Analysis, And Implementation Of Circular Disk - Annular Ring (cdar) Antenna." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12609156/index.pdf.

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In satellite applications, a circularly polarized satellite antenna is desirable with a pattern that results in constant received power while the distance between the transmitter and the receiver is changing. The Circular Disk - Annular Ring (CDAR) antenna satisfies these requirements along with other requirements for the satellite antenna. The CDAR antenna is a combination of a Circular Disk and an Annular Ring patch antennas. In this thesis, a circularly polarized CDAR antenna that is fed from a single point is designed at the center frequency of 8.2 GHz. This antenna is investigated and optimized to ease the fabrication process. The design parameters are defined on this report and optimized by using an Electromagnetic Simulation software program. In order to verify the theoretical results, Circular Disk - Annular Ring Antenna is produced as a prototype. Measurements of antenna parameters, electromagnetic field and circuit properties are interpreted to show compliance with theoretical and simulation results. The values of deviation between theoretical and experimental results are also discussed.
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PARTHASARATHY, KRISHNAN V. "MUTUAL COUPLING IN PATCH ANTENNA ARRAYS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1148325728.

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Orr, Robert Mervyn. "Application of frequency selective surfaces in circular polarization antenna technologies." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.675421.

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The objective of the work in this thesis is to design lightweight, low profile, circular polarization (CP) antenna technologies which have potential for use in satellite communication systems. A new class of CP Fabry-Perot (FP) cavity antenna which may be used as a replacement for bulky CP horn antennas is developed. A double-sided partially reflective surface (PRS) is employed in the design. The resulting class of antennas are appealing as they allow a specified gain in CP to be achieved while maintaining the simplicity of a single cavity structure and a linearly polarized (LP) primary feed. An example demonstrator antenna with a gain of approximately 21 dB at 15 GHz is designed using the full-wave electromagnetic simulation tool, CST Microwave Studio (MWS). A prototype is produced and measured in order to validate the simulation results. Frequency selective surfaces (FSS) are employed as quasi-optical diplexers in satellite communication systems to facilitate multiband reflector antenna operation therefore allowing multiple feed antennas to share the same aperture. In this thesis quasi-optical diplexers suitable for CP dual frequency band operation are considered. A new class of polarizing surface is developed which in a given frequency band reflects incident linearly polarized waves with circular polarization (CP) while at other frequencies it is transparent allowing incident waves to be transmitted. In addition, a new type of CP FSS which conserves a CP signal upon reflection and transmission is designed. The axial ratio in the reflection and transmission bands is reported for both structures. Numerical EM simulation supported as necessary with analytical analysis is used throughout.
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Hussain, Asif Jamshaid. "Design of an Ultra Wideband (UWB) Circular Disc Monopole Antenna." Thesis, Linnéuniversitetet, Institutionen för datavetenskap, fysik och matematik, DFM, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-34605.

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My task was to design a circular disc monopole antenna in the Ultrawideband range i.e. 3.1 - 10.6 GHz using the ADS (Advanced Design System) package. In order to achieve the desired matching I simulated dierent sizes of the radiator, feed line and the ground plane of the antenna and observed the current flow in a circular monopole at different frequencies. I did some miniaturization (circular shape and chopping) of the antenna and observed the current flow and radiation pattern in 2D and 3D.
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Books on the topic "Circular antenna"

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Lee, C. S. G. A simple circular-polarized antenna: Circular waveguide horn coated with lossy magnetic material. Arbana, Ill: Electromagnetics Laboratory, Dept. of Electrical and Computer Engineering, Engineering Experiment Station, University of Illinois at Urbana-Champaign, 1986.

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Lee, C. S. G. A simple circular-polarized antenna: Circular waveguide horn coated with lossy magnetic material. Arbana, Ill: Electromagnetics Laboratory, Dept. of Electrical and Computer Engineering, Engineering Experiment Station, University of Illinois at Urbana-Champaign, 1986.

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Kempel, Leo C. Radiation and scattering by cavity-backed antennas on a circular cylinder. Ann Arbor, Mich: University of Michigan, Radiation Laboratory, Dept. of Electrical Engineering and Computer Science, 1993.

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Horan, Stephen. Non-gimbaled antenna pointing: Summary of results and analysis. [Washington, DC: National Aeronautics and Space Administration, 1998.

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Bailey, M. C. Closed-form evaluation of mutual coupling in a planar array of circular apertures. Washington, D.C: National Aeronautics and Space Administration, 1996.

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Bailey, M. C. Closed-form evaluation of mutual coupling in a planar array of circular apertures. Hampton, Va: Langley Research Center, 1996.

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Simons, Rainee N. Suspended patch antennas with electromagnetically coupled inverted microstrip feed for circular polarization: [final report]. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2000.

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Simons, Rainee N. Novel on-wafer radiation pattern measurement technique for MEMS actuator based reconfigurable patch antennas. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2003.

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Simons, Rainee N. Novel on-wafer radiation pattern measurement technique for MEMS actuator based reconfigurable patch antennas. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2003.

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Simons, Rainee N. Novel on-wafer radiation pattern measurement technique for MEMS actuator based reconfigurable patch antennas. Cleveland, Ohio: National Aeronautics and Space Administration, Glenn Research Center, 2003.

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Book chapters on the topic "Circular antenna"

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Geng, Junping. "A Circular Truncated Cone Slot Antenna with Circular Polarized Conical Beam." In Omnidirectional Slots Antenna, 113–24. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-9089-4_6.

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Sidhu, Sumanpreet Kaur, and Jagtar Singh Sivia. "Circular-Shape Slotted Microstrip Antenna." In Proceedings of the International Congress on Information and Communication Technology, 291–97. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-0755-2_31.

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Janisha, R. S., D. Vishnu, and O. Sheeba. "Frequency Reconfigurable Circular Patch Antenna." In Intelligent Data Communication Technologies and Internet of Things, 109–18. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9509-7_10.

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Lasaygues, P., S. Mensah, and J. P. Lefebvre. "Ultrasonic Diffraction Tomography: Multichannel Circular Antenna." In Acoustical Imaging, 601–5. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2402-3_76.

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Rajshri, Saumya Das, and Tanushree Bose. "Multiband Slotted Circular Microstrip Patch Antenna." In Advances in Communication, Devices and Networking, 351–58. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7901-6_38.

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Ramkiran, D. S., P. Siddaiah, and B. T. P. Madhav. "Band-Notched Circular Serrated Wideband Antenna." In Proceedings of 2nd International Conference on Micro-Electronics, Electromagnetics and Telecommunications, 555–63. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4280-5_58.

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Deshmukh, Amit A., Anuja Odhekar, Akshay Doshi, and Pritish Kamble. "Modified Circular Shape Microstrip Antenna for Circularly Polarized Response." In Lecture Notes on Data Engineering and Communications Technologies, 207–15. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8339-6_23.

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Mat Salleh, Shakhirul, Muzammil Jusoh, Abdul Hafiizh Ismail, Mohd Najib Mohd Yasin, Muhammad Ramlee Kamarudin, and Roshayati Yahya. "Circular Polarization Textile Antenna for GPS Application." In Theory and Applications of Applied Electromagnetics, 255–63. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17269-9_28.

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Aminu-Baba, Murtala, Mohammad Kamal A. Rahim, Farid Zubir, Mohd Fairus Mohd Yusoff, and Noor Asmawati Samsuri. "Wideband Monopole Antenna with Rotational Circular SRR." In 10th International Conference on Robotics, Vision, Signal Processing and Power Applications, 419–24. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6447-1_53.

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Gao, Jin, Bo Zhang, Qingnuan Hu, Jinjin Zhang, Yang Li, Xiaonan Zhao, Cuiping Zhang, and Cheng Wang. "Circular Antenna Array-Based Directional Modulation Design." In Lecture Notes in Electrical Engineering, 1055–61. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8411-4_139.

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Conference papers on the topic "Circular antenna"

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Daliri, Ali, Chun H. Wang, Sabu John, Amir Galehdar, Wayne S. T. Rowe, and Kamran Ghorbani. "Multidirectional Circular Microstrip Patch Antenna Strain Sensor." In ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2011. http://dx.doi.org/10.1115/smasis2011-5065.

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In this paper, a new design for microstrip patch antenna strain sensors is proposed. The new antenna sensor works based on the meandered microstrip patch antennas. It is threefold more sensitive than previously proposed circular microstrip patch antenna strain sensors. Also, the overall physical dimension of the new antenna sensor is reduced by the factor of five. The current sensor is able to detect strain in all directions. In order to design the antenna sensor, two available commercial FEM software packages ANSYS™ and HFSS™ are used. Both experimental and FEM results corroborate the multidirectional feature of the new antenna sensor. Also, the effect of the hole size in the structure (for coaxial connection to the antenna) on the antenna performance has been studied. Based on the results obtained, the antenna sensor can be recommended for use in structural health monitoring for strain-based damage detection in aerospace structures.
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Coopmans, Calvin, Hadi Malek, and Edmund Spencer. "Radiation and Impedance Characteristics of a Circular Loop Antenna Driven by Fractional Order Electronics." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-13227.

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Fractional calculus techniques (non-integer order systems) have been successfully applied in many fields of electronics and engineering. In this paper the effects of including fractional order electronic components on the radiated antenna pattern of a circular loop antenna is presented. A fractional order “RLC” impedance matching circuit is placed between the generator and the equivalent circuit of a loop antenna. The input impedance of the antenna and the antenna gain are controllable through varying the fractional orders of an inductive element and a capacitive element (Fractors) in the matching network. The circuit is presented and solved analytically, and some numerical simulations follow. We discuss the effects of fractional order components on the resulting radiation patterns. In particular, the amplitude of the antenna gain is controlled by the fractional order parameters. This effect could be exploited in future for antenna beam-forming applications when using an array of antenna elements. Further, the input impedance of the antenna circuit can also be controlled by the fractional order components. The introduction of fractional order variables provides for higher degrees of freedom, enabling a flexible approach to tuning antennas for optimal performance.
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Tseng, Yen-Ming, Shang-Huang Kuo, Horng-Dean Chen, and Chow-Yen-Desmond Sim. "Circularly polarized circular microstrip RFID tag antenna." In 2012 Asia Pacific Microwave Conference (APMC). IEEE, 2012. http://dx.doi.org/10.1109/apmc.2012.6421850.

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Rahim, M. K. A., T. Masri, O. Ayop, and H. A. Majid. "Circular Polarization Array Antenna." In 2008 Asia Pacific Microwave Conference. IEEE, 2008. http://dx.doi.org/10.1109/apmc.2008.4958159.

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Ahmadi, Farzaneh, Keyvan Forooraghi, and Zahra Atlasbaf. "Circular polarized reflectarray antenna." In 2012 20th Iranian Conference on Electrical Engineering (ICEE). IEEE, 2012. http://dx.doi.org/10.1109/iraniancee.2012.6292525.

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Barbakadze, V., V. Tabatadze, I. Petoev, and R. Zaridze. "Directed Circular Polarized Antenna." In 2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED). IEEE, 2018. http://dx.doi.org/10.1109/diped.2018.8543324.

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Yo, Tzong-Chee, Chien-Ming Lee, and Ching-Hsing Luo. "Small Single Band Circular Polarization and Dual Band Circular Patch Antenna." In 2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications. IEEE, 2007. http://dx.doi.org/10.1109/iwat.2007.370167.

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Togcuoglu, Nurettin Baha, Yunus Albayrak, Mustafa Niyazi Saylik, Melik Ahmet Daye, Mustafa Bal, Mustafa Imeci, and Taha Imeci. "Circular patch antenna with circular and rectangular slots." In 2017 25th Signal Processing and Communications Applications Conference (SIU). IEEE, 2017. http://dx.doi.org/10.1109/siu.2017.7960266.

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Daliri, Ali, Sabu John, Amir Galehdar, Wayne S. T. Rowe, and Kamran Ghorbani. "Strain Measurement in Composite Materials Using Microstrip Patch Antennas." In ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2010. http://dx.doi.org/10.1115/smasis2010-3703.

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In this paper the feasibility of using a circular microstrip patch antenna to detect strain in composite plates and the effects of different materials on sensitivity of the patch antenna are investigated. Also the effect of strain direction on the frequency shift is studied. The theoretical model shows a linear relationship between strain and the shift in the resonant frequency of the antenna in any material. A circular microstrip patch antenna is designed and fabricated to work at 1.5GHz and attached to three different materials for testing. Both Finite Element Analysis (FEA) and experimental tests have been undertaken to corroborate the relationship between strain and frequency shift. The ultimate intention of this work is to configure antennas for the detection of relatively small damage zones in structures and to do so wirelessly.
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Jan, Jen-Yea, Guo-Jhih Wu, Chien-Yuan Pan, and Hua-Ming Chen. "Broadband microstrip-line-fed circularly-polarized circular slot antenna." In 2014 IEEE International Workshop on Electromagnetics; Applications and Student Innovation (iWEM). IEEE, 2014. http://dx.doi.org/10.1109/iwem.2014.6963634.

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Reports on the topic "Circular antenna"

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Zaghloul, Amir I., Youn M. Lee, Gregory A. Mitchell, and Theodore K. Anthony. Enhanced Ultra-Wideband (UWB) Circular Monopole Antenna with Electromagnetic Band Gap (EBG) Surface and Director. Fort Belvoir, VA: Defense Technical Information Center, August 2014. http://dx.doi.org/10.21236/ada608706.

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Habib, Jahin S. Optimization of a Circularly Polarized Patch Antenna for Two Frequency Bands. Fort Belvoir, VA: Defense Technical Information Center, September 2015. http://dx.doi.org/10.21236/ada622301.

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Zabunov, Svetoslav, Garo Mardirossian, and Roumen Nedkov. Recent Innovations in Circularly Polarized Antennas for Drone Radio Communication. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, September 2020. http://dx.doi.org/10.7546/crabs.2020.09.13.

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