Dispersion of resonant modes in patch antenna lattices

Abstract We propose simple designs of compact patch antennas with bandwidth enhancement. Firstly, an inverted “L” strip is loaded onto the corner of one radiating patch edge to create an additional resonant mode which can be combined with that one of the conventional patch to enhance the operating bandwidth. Secondly, the “L” strip is replaced by inverted “T” strip to improve further the bandwidth by creating two adjustable resonant modes. The two proposed patch antennas have the particularity of enhancing the bandwidth significantly without increasing their profile and their overall sizes. Two antenna prototypes are fabricated and tested. Measurements reveal that the patch antenna loaded with “L” strip has stable radiation characteristics with 5.2 times enhancement in the relative bandwidth compared with a conventional patch antenna. The antenna loaded with inverted “T” strip has wider bandwidth (6.25 times wider than the conventional patch) and covers the operating band 5.07–5.89 GHz (15%) with measured peak gain and peak efficiency of 6.25 dBi and 78%, respectively. The proposed antennas are easy to fabricate, have a low-profile, and exhibit good performances which make them good candidates to use in real wireless applications.

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Wideband Shorted Patch Antenna Under Radiation of Dual-Resonant Modes

IEEE Transactions on Antennas and Propagation ◽

10.1109/tap.2017.2688802 ◽

2017 ◽

Vol 65 (6) ◽

pp. 2789-2796 ◽

Cited By ~ 26

Author(s):

Neng-Wu Liu ◽

Lei Zhu ◽

Wai-Wa Choi ◽

Xiao Zhang

Keyword(s):

Patch Antenna ◽

Resonant Modes

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Bandwidth and Gain Enhancement of Patch Antenna with Stacked Parasitic Strips Based on LTCC Technology

International Journal of Antennas and Propagation ◽

10.1155/2014/461423 ◽

2014 ◽

Vol 2014 ◽

pp. 1-5 ◽

Cited By ~ 4

Author(s):

Li Li ◽

Yong Zhang ◽

Jinhong Wang ◽

Wei Zhao ◽

Shuang Liu ◽

...

Keyword(s):

Low Temperature ◽

Patch Antenna ◽

Impedance Bandwidth ◽

Radiation Patterns ◽

Antenna Radiation ◽

Maximum Gain ◽

Gain Enhancement ◽

Resonant Modes ◽

Operating Bandwidth

A compact patch antenna with stacked parasitic strips (SPSs) based on low temperature cofired ceramic (LTCC) technology is presented. By adding three pairs of SPSs above the traditional patch antenna, multiple resonant modes are excited to broaden the bandwidth. At the same time, the SPSs act as directors to guide the antenna radiation toward broadside direction to enhance the gain. The measured results show that the prototype antenna achieves an impedance bandwidth of 16% forS11<-10 dB (32.1–37.9 GHz) and a maximum gain of about 8 dBi at 35 GHz. Furthermore, the radiation patterns and gain are relatively stable within the operating bandwidth. The total volume of the antenna is only 8 × 8 × 1.1 mm3.

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A Low-Profile Differential-Fed Microstrip Patch Antenna with Wide-Beamwidth and High-Gain under Dual-Band by Multi-Resonant Modes

10.1109/icmmt52847.2021.9618293 ◽

2021 ◽

Author(s):

Yu-Dong Liang ◽

Neng-Wu Liu ◽

Lei Zhu ◽

Guang Fu

Keyword(s):

Patch Antenna ◽

High Gain ◽

Microstrip Patch Antenna ◽

Dual Band ◽

Microstrip Patch ◽

Low Profile ◽

Resonant Modes

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A Single-Layer Dual-Band Shorted-Patch Antenna with Same Circularly Polarization Based on Multi-Resonant Modes

10.23919/aces-china52398.2021.9581603 ◽

2021 ◽

Author(s):

Zhen-Jun Kang ◽

Neng-Wu Liu ◽

Lei Zhu ◽

Guang Fu

Keyword(s):

Patch Antenna ◽

Single Layer ◽

Dual Band ◽

Resonant Modes

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A Wideband Differential-Fed Microstrip Patch Antenna Based on Radiation of Three Resonant Modes

International Journal of Antennas and Propagation ◽

10.1155/2019/4656141 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7 ◽

Cited By ~ 4

Author(s):

Taohua Chen ◽

Yueyun Chen ◽

Rongling Jian

Keyword(s):

Patch Antenna ◽

Free Space ◽

Impedance Matching ◽

Microstrip Patch Antenna ◽

Impedance Bandwidth ◽

Current Position ◽

Microstrip Patch ◽

Zero Current ◽

Resonant Modes ◽

Rectangular Strips

A wideband differential-fed microstrip patch antenna based on radiation of three resonant modes of TM12, TM30, and slot is proposed in this paper. Firstly, two symmetrical rectangular slots are cut on the radiating patch where the zero-current position of the TM30 mode excites another resonant slot mode. In addition, the slot’s length is enlarged to decrease the frequency of the slot mode with little effect on that of the TM30 mode. To further expand the impedance bandwidth, the width of patch is reduced to increase the frequency of the TM12 mode, while having little influence on that of the TM30 and slot modes. Moreover, a pair of small rectangular strips is adopted on the top of the feeding probes to achieve a good impedance matching. Finally, based on the arrangements above, a broadband microstrip patch antenna with three in-band minima is realized. The results show that the impedance bandwidth (Sdd11<−10 dB) of the proposed antenna is extended to 35.8% at the profile of 0.067 free-space wavelength. Meanwhile, the proposed antenna maintains a stable radiation pattern in the operating band.

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