Two-Port Same-Polarized Patch Antenna Based on Two Out-of-Phase TM<sub>10</sub> Modes for Access-Point MIMO Antenna Application

Jian, Miao-Fang; Chen, Ching-Jui; Chen, Jianzhong

doi:10.1109/lawp.2021.3057420

Cited by 35 publications

(8 citation statements)

References 15 publications

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“…In [48], Sun and Zhang presented the orthogonal dipole mode and monopole Recently, the mutual coupling of multiport antennas with the same polarization and radiation pattern has been deeply investigated. Initially, the coupled-resonator theory based on multimode antennas was proposed and developed in [50], [51] to improve their isolation to above 20 dB. Next, two out-of-phase TM 10 modes modified the excited electric field distribution inside the resonant cavity, thus achieving a small mutual coupling of less than −15 dB [52].…”

Section: Mutual Coupling Reduction Mmrmentioning

confidence: 99%

Multimode Resonator Technique in Antennas: A Review

Li¹,

Liu

2023

Electromag. Sci.

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During the past several decades, the multimode resonator (MMR) technique has been extensively investigated and widely used, with successful exploration of a variety of high-performance patch antennas, slot antennas, dielectric resonant antennas, dipole antennas, and so on. In this review paper, we summarize the research milestones for these MMR antennas worldwide as one of the most contributive research teams in this field. First, the basic working principles of the MMR technique are clearly illustrated and studied, including mode excitation, mode suppression, impedance performance improvement, and radiation performance improvement. Next, the research topics regarding impedance performance enhancement, i.e., widebandwidth operation, multibandwidth operation, and mutual coupling reduction, based on the MMR method are intensively described. After that, the relevant works on radiation performance enhancement, i.e., high-gain, wide-beamwidth, multibeam, multipolarization, low-cross-polarization, filtering-response, and leaky-wave antennas, based on the MMR method are extensively illustrated. By using this technique, several ideas about operating frequency reallocation, electric-field null control, radiation pattern reshaping, and efficiency null generation of the antennas are proposed and demonstrated by our team for the first time. In addition, the application of the MMR technique for wireless communication systems is introduced and presented, such as implant communication, wireless power transfer, and multiple-input multiple-output communication. With these arrangements, exploration and reporting of more interesting and useful MMR design methods can be anticipated in the future.

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Section: Mutual Coupling Reduction Mmrmentioning

confidence: 99%

Multimode Resonator Technique in Antennas: A Review

Li¹,

Liu

2023

Electromag. Sci.

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“…26,27 To further utilize space resources, an antenna pair sharing a radiator without additional decoupling structure is proposed by Ren and coworkers. [28][29][30][31] In Wong and coworkers, [32][33][34][35][36][37] shorting structure is adopted to weaken the coupling current.…”

Section: Introductionmentioning

confidence: 99%

“…Resonator decoupling technology is another method to eliminate coupling between antennas 26,27 . To further utilize space resources, an antenna pair sharing a radiator without additional decoupling structure is proposed by Ren and coworkers 28–31 . In Wong and coworkers, 32–37 shorting structure is adopted to weaken the coupling current.…”

Section: Introductionmentioning

confidence: 99%

Compact wideband MIMO antenna with fragmented patches for 5G mobile terminals

Liu,

Liu

2023

Micro & Optical Tech Letters

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A compact wideband MIMO antenna obtained by breaking up an intact rectangular patch into a 2 × 5 small patch array with connected strips is proposed for 5G mobile terminals. The diagonal small patches are connected with the metal strips respectively, so as to constitute an interleaved double branch composed of a main branch and a parasitic branch, thus achieving compactness. The main branch fed by two ports operates at 4.5 GHz, and the parasitic branch coupled by the main branch achieves a lower resonant frequency of 3.35 GHz, thus widening the bandwidth. The small patches in the middle are connected to the ground to improve the isolation. A short length of 21.5 mm (about 0.24 wavelength of the lower‐edge frequency) of the proposed antenna pair is realized. Besides, an eight‐element MIMO antenna is designed and fabricated. Measured results show the reflection coefficients are lower than −6 dB, and the transmission coefficients between every two ports are lower than −10 dB in the 5G N77/N78/N79 bands (3.3–5.0 GHz). The average total efficiencies are 70.4% and 63.8% for antenna 1 and antenna 2, respectively. The ECCs are lower than 0.15.

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“…Very recently, the research on the isolation improvement of two-port copolarized SPAs has also received increasing attention, although there are not too many reported works at present. [24][25][26] When the two ports are isolated effectively, each port is equivalent to exciting a separated antenna independently, as illustrated in Figure 1. This implementation can be seen as an alternative solution for shared-antenna type in IBFD systems without using circulators and duplexers.…”

Section: Introductionmentioning

confidence: 99%

“…This implementation can be seen as an alternative solution for shared‐antenna type in IBFD systems without using circulators and duplexers. In Reference 24, a conducting block structure was introduced between two feeding posts to enhance the isolation. However, this decoupling structure inevitably increases the profile of the SPA.…”

Section: Introductionmentioning

confidence: 99%

Port isolation improvement of full‐duplex single‐patch antenna by loading full‐wave resonators

Deng

2022

Int J RF Mic Comp-Aid Eng

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In this article, a pair of full-wave microstrip resonators is loaded at the nonradiative edges of the patch to improve port isolation of two-port copolarized single-patch antennas (SPAs) for full-duplex applications. First, the decoupling mechanism and its resulting radiation characteristics are exhaustively analyzed, which indicates that more similar radiation patterns and lower crosspolarization can be achieved based on the directly suppressing port coupling.Then, a transversal-section-like topology composed of an additional interference path and the SPA is proposed to realize this purpose. To clearly illustrate the operation principle in practical design, the phase shifts of both paths, that is, the interference paths from Port 1 to Port 2 via the patch and the full-wave resonators, are exhaustively investigated. Attributing to the realization of a stable 180 out of phase between the two paths, the resultant signal is highly and stably attenuated by the interfering signal, and the desired port isolation is satisfactorily attained by manipulating its amplitude readily. The measured results show a dramatic enhancement in isolation between the two ports from 4 to 55 dB with good impedance matching at the two ports. Most importantly, benefiting from the idea of direct port isolation, the radiation performance is hardly deteriorated, with a maximum gain of 8 dBi, beam squint angle of only 10 , and low crosspolarization in the upper half-space.

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Two-Port Same-Polarized Patch Antenna Based on Two Out-of-Phase TM₁₀ Modes for Access-Point MIMO Antenna Application

Cited by 35 publications

References 15 publications

Multimode Resonator Technique in Antennas: A Review

Multimode Resonator Technique in Antennas: A Review

Compact wideband MIMO antenna with fragmented patches for 5G mobile terminals

Port isolation improvement of full‐duplex single‐patch antenna by loading full‐wave resonators

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Two-Port Same-Polarized Patch Antenna Based on Two Out-of-Phase TM10 Modes for Access-Point MIMO Antenna Application

Cited by 35 publications

References 15 publications

Multimode Resonator Technique in Antennas: A Review

Multimode Resonator Technique in Antennas: A Review

Compact wideband MIMO antenna with fragmented patches for 5G mobile terminals

Port isolation improvement of full‐duplex single‐patch antenna by loading full‐wave resonators

Contact Info

Product

Resources

About

Two-Port Same-Polarized Patch Antenna Based on Two Out-of-Phase TM₁₀ Modes for Access-Point MIMO Antenna Application