Relevant bibliographies by topics / Dual-band operation / Dissertations / Theses
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Dissertations / Theses on the topic 'Dual-band operation'

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Published: 2 June 2025
Last updated: 31 July 2025

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1

Waldstein, Seth William. "Compound Reconfigurable Dual-band Solid State Power Amplifier using a Single GaN HEMT for S and X-band Operations." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563874650458585.

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2

Cheng, Yi-Ming, and 鄭易銘. "Z-Shape Microstrip Antenna for Dual-Band Operation." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/79213534854161145724.

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碩士<br>義守大學<br>電子工程學系<br>101<br>This thesis uses a simple concept to design a coplanar microstrip antenna for dual band operation. When the microstrip patch is reshaped into a Z, the magnetic current on PMC can contribute the radiation with the same polarization, thus antenna can operate at dual bands. And the design concept is confirmed by theoretical results, simulation and experiment, the characteristics of antenna can be obtained by investigation on parameter variations. As the characteristics of Z-shape microstrip antenna, result shows that the distribution of electric field along the lon
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3

Tai, Chung-Lun, and 戴崇倫. "T-Shape Microstrip Antenna for Dual-Band Operation." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/69153002479532497633.

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碩士<br>義守大學<br>電子工程學系碩士班<br>99<br>For the demands of multiple functions for communication and integration with circuits, this thesis uses concept of electric-field distortion to design a T-shape microstrip antenna with simple coplanar structure for dual-band operation. The design concept is to cut the shape of a conventional microstrip antenna, and higher and lower modes are excited within two different resonant cavities. With specific dimensions of antenna, two modes have well radiation patterns, and their impedance is easy to match. According to the result of study on structure parameters, th
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4

Yang, Weiren, and 楊維仁. "Concave-Shape Microstrip Antenna For Dual-Band Operation." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/03044327367776420328.

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碩士<br>義守大學<br>電子工程學系<br>100<br>The purpose of this thesis is to increase the design freedom of T-shape microstrip antenna, first approach is to use the structure by two different dielectrics to increase the adjustable parameters compared to the original T-antenna. Second approach is to adapt the concept of T-antenna and to employ the two resonance lengths of complicated concave-shape structure to produce two different modes to achieve the demands. For T-antenna with two different dielectrics, it not only maintain the function of dual-band operation but also provide parameter to adjust the sepa
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5

kuo, Tzu-Hao, and 郭子豪. "Design of Dual-band Operation for Wide-Slot Antennas." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/39962775339531128299.

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碩士<br>樹德科技大學<br>電腦與通訊研究所<br>96<br>This paper presents a novel design of the coplanar waveguide (CPW)-fed wide slot antenna with a widened tuning stub by adding an extra resonant element in/on the area of the ground-plane metal or other space, a new dual-band or wide slot antenna will be performed. Hence, how to excite dual modes or multiple adjacent resonant modes with similar radiation characteristics for the coplanar waveguide (CPW)-fed wide slot antennas design is the key point. From the relative technical literature it can be found that if the original resonant mode of the conventional pat
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6

Lin, Chih-Cheng, and 林志澄. "Double -Folded Monopole Microstrip Antenna for Dual-Band Operation." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/48153986892351748807.

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碩士<br>義守大學<br>電子工程學系<br>103<br>This thesis uses the concept of double folded structure to design a dual-band monopole microstrip antenna for integration with a coplanar system. The reversed currents of the 2nd mode can cancel with each other, the dominant current becomes singly directed as that of the first mode. Thus the radiations pattern of the two modes can be similar to donut shapes. The data from theory, simulation and experiment verifies design concept, and the variation of structure is used to investigate antenna characteristics. For this double-folded antenna, the design focuses on th
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7

Lin, Yijyun, and 林怡君. "Circular T-Shape Microstrip Antenna For Dual-Band Operation." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/64698841176841877914.

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碩士<br>義守大學<br>電子工程學系<br>100<br>This thesis uses the concept of T-shape microstrip antenna to cylindrical microstrip structure to design a circular T-shape microstrip antenna with size reduction and dual-band operation. The main design concept is to extend structure, and the low and high modes are decided by two different resonance path length. The component of magnetic current on structure boundary increases, then freedom of radiation can be improved, the limitation of single mode is also improved. For the characteristics of circular T-shape microstrip antenna, results show that technique of e
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8

Chen, Huan-Yu, and 陳煥宇. "Dual-Band Circularly Polarized Antenna Array for WLAN Operation." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9ukkjx.

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9

Kao, Chin-Hsin, and 高志鑫. "A New Design of Antenna with Broad/Dual Band Operation." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/53448064137777098187.

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碩士<br>南台科技大學<br>電子工程系<br>94<br>The designs of the antennas for broadband and dual-band characteristic have been investigated in this paper. The major topics of this paper include the printed slot of microstrip-line-fed antenna and the coplanar waveguide (CPW) fed antenna. The printed microstrip-line-fed slot antenna consists of a printed microstrip-line-fed adding one copper slice bend, a three-dimensional microstrip-line structure. For the feature of three-dimensional microstrip-line slot antenna generates several resonant modes to reach broadband, then we observe various three-dimensional mi
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10

Wu, Shan-Chun, and 吳善群. "Design of Planar Monopole Antenna with Broad/Dual Band Operation." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/34212633109810613407.

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碩士<br>南台科技大學<br>電子工程系<br>93<br>In this paper, the series of designs and studies for planar monopole antenna are presented. I’ll illustrate the subjects of a broadband domain and a dual-band domain separately. It is the disc monopole antenna that we design the base of broadband. For the feature of elliptical disc product more kinds resonant modes, we can up to the effect of broadband. The yielded maximum band- width for return loss > 10 dB is between 1.8 GHz to 6 GHz. We modify the structure of elliptical disc which add the slot to reduce the size of the antenna. In that way, we can improve the
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11

Wang, Te Chien, and 王德謙. "Inverse S- Shape Microstrip Dipole Antenna For Dual Band Operation." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/68568790771894508647.

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碩士<br>義守大學<br>電子工程學系碩士在職專班<br>101<br>Multi-antenna systems will be tendency of future wireless communication systems, but multi-antenna systems have high power, huge size, high-cost disadvantage, so multi-frequency operation of antennas is future trend. As traditional rectangular microstrip antenna does not have omni-directional radiation pattern, cannot be used on cell phone. Therefore, this thesis presents omni-directional radiation pattern antenna for cell phone, it can be operated for dual band frequency the inverse S-shape microstrip dipole antenna. This concept is to fold linear dipole a
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12

Wu, Cheng-Chao, and 吳承釗. "Double-Folded T-Shape Microstrip Antenna for Dual-Band Operation." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/50399987996062102319.

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碩士<br>義守大學<br>電子工程學系<br>102<br>This thesis uses folded structure to improve the problem on limited operation band for T-shape dual-band microstrip antenna, and to investigate the effect on radiation of folded arrangement. As a microstrip patch is changed into a double-folded structure, the vectors of magnetic currents on PMCs will point to opposite directions with each other, the X-polarization of radiation will thus be reduced. For the two modes of this antenna, the frequency band with acceptable radiation will increase, so as the choice of resonant lengths for adjustment. In addition to the
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13

Chen, Meng-Wei, and 陳孟暐. "T-shape Microstrip Antenna with Concave Structure for Dual-band Operation." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/03774279994859898965.

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碩士<br>義守大學<br>電機工程學系碩士在職專班<br>102<br>This thesis uses the simple concept of concaved structure to improve the limitation of frequency band for T-shape microstrip antennas. The idea is originally from the design of conventional microstrip antennas with concaved slot. The antenna radiations become unacceptable, but the design freedom is much higer than euer. As the idea is applied to T-shap microstrip antenna, there are more parameters to adjust antenna radiation, such that the electric fields in cavity is able to improve radiation of the cross polarization, This thesis first uses three sets of
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14

CHENG, CHI-HSIANG, and 鄭吉翔. "A Compact Band-Pass Slotted-Ground-Plane Filter for Dual-Mode Operation." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/wn27d8.

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15

Lin, Jun-Yu, and 林俊佑. "design of CPW-fed slot antennas for dual- and ultra wide-band operation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/60288199931413550753.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>97<br>In this paper, the use of coplanar waveguide feed structure, a design used in WLAN and UWB band antenna. The use of inductive Slot-Monopole hybrid antenna to achieve WLAN band, monopole antenna is mainly used to stimulate the low-frequency part of the required of WLAN, and inductive slot is to stimulate high-frequency part of WLAN, have a good impedance matching, 2.4/5.5GHz dual-band excitation, WALN needed to cover the scope of 2.4GHz ~ 2.475GHz and 5.15GHz ~ 5.85GHz, maximum radiation gain of the antenna 2.84dBi/5.85dBi. Another part of the UWB, composed o
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16

Chan, Chi-Hung, and 詹麒宏. "New Crossover Coupler Design Using Asymmetric Branch-Line Hybrids and Its Dual-Band Operation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/04074713060043924164.

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碩士<br>國立交通大學<br>電信工程研究所<br>98<br>Two asymmetric branch-line hybrids with arbitrary power divisions are cascaded for design of a crossover coupler. The two pairs of the diagonal ports are allowed to have different characteristic impedances. Block ABCD matrices are applied to estimate the bandwidth of the crossover coupler. To achieve the dual-band operation, an elementary two-port is employed to replace the ??4-section of each hybrid. The two-port consists of a stepped-impedance section with two open stubs shunt at both of its ends. By means of the transmission-line theory, analytical equat
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17

Chen, Chin-Chia, and 陳勁嘉. "Use a Single Disturbing Patch to Design Microstrip Antennas for Dual or Multi-Band Operation." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/74906116606520614621.

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碩士<br>義守大學<br>電子工程學系<br>101<br>The purpose of thesis is to employ the technique of disturbing electric field by dual patches to design microstrip antennas with high design freedom for dual or multi-band operation. The major approach is to use a single disturbing patch to interfere uniform distribution of the electric field into two different modes. Further, various disturbing patch shapes or more numbers of patches is used to increase disturbing, and either to adjust the separation of resonant frequency or to create the function of triple-band operation for microstrip antennas. For the micros
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18

Pan, Chieh-Lun, and 潘玠倫. "Design of a CPW-fed Circularly Polarized Antenna and a Single-layer Planar Inverted-F Antenna with Dual-band Operation." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/59731478374593523410.

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碩士<br>國立交通大學<br>電信工程研究所<br>101<br>This paper composed by two research topics. One is the effects of asymmetrical ground on CPW-fed wideband circularly polarized antenna for application of the GPS band and another is the effects of different antenna type on the design of single layer miniaturized dual-band planar inverted-F antenna For the first topic, we choose the CPW-fed for the structure of the circularly polarized antenna due to the advantage that having wider axial ratio bandwidth than microstrip-fed. We generate the circularly polarized feature which means that there are two orthogonal r
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19

Chen, Ko-ming, and 陳客名. "Printed Monopole Antenna for Dual-band 802.11a/b/g Operations." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/04841438668401588253.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>96<br>A novel and simple printed dual band double T monopole antenna is proposed. The antenna comprises two separate stacked T shaped monopoles of different sizes, which generate two separate resonant modes for the desired dual-band operations. The proposed antenna has a low profile and can easily be fed by using a 50 Ω microstrip line. Prototypes of the proposed antenna designed for WLAN operations in the 2.4GHz and 5.2GHz bands have been constructed and tested. Good radiation characteristics of the proposed antenna have been obtained. Effects of varying the monopol
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20

Chen, Chia-Ching, and 陳嘉慶. "Design of Traveling-Wave Antennas for Dual-Band Operations, Gain Enhancement and Back-Lobe Suppression." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/3vgef5.

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碩士<br>國立交通大學<br>電信工程研究所<br>102<br>In this thesis, a dual-band half-mode substrate integrated waveguide(HMSIW) traveling-wave antenna(TWA) with feedback network and a single-conductor tapered strip traveling- wave antenna are proposed. The classical TWAs are always terminated at the end of antenna. Because the remaining power reflected from the end of TWA may excite back lobe to spoil the radiation pattern. Otherwise, its longitudinal length requires 5~10λ to radiate efficiently, and it will occupy too much space to fabricate in low price. In our first design, using feedback network of HMSIW TW
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21

Behera, Subhrakanta. "Design And Analysis Of Microstrip Ring Antennas For Multi-frequency Operations." Thesis, 2011. https://etd.iisc.ac.in/handle/2005/2059.

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In this research we attempted several modifications to microstrip ring/loop antennas to design multi-frequency antennas through systematic approaches. Such multi-frequency antennas can be useful while building compact terminals to operate at multiple wireless standards. One of the primary contributions was the use of a capacitive feed arrangement that enables simultaneous excitation of multiple concentric rings from an underlying transmission line. The combined antenna operates in the same resonant bands as the individual rings and avoids some of the bands at harmonic frequencies. A similar
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22

Behera, Subhrakanta. "Design And Analysis Of Microstrip Ring Antennas For Multi-frequency Operations." Thesis, 2011. http://etd.iisc.ernet.in/handle/2005/2059.

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In this research we attempted several modifications to microstrip ring/loop antennas to design multi-frequency antennas through systematic approaches. Such multi-frequency antennas can be useful while building compact terminals to operate at multiple wireless standards. One of the primary contributions was the use of a capacitive feed arrangement that enables simultaneous excitation of multiple concentric rings from an underlying transmission line. The combined antenna operates in the same resonant bands as the individual rings and avoids some of the bands at harmonic frequencies. A similar
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