A Low-Profile and Wideband Circularly Polarized Patch Antenna Based on TM<sub>11</sub> and TM<sub>21</sub>

Liang, Chang-Feng; Lyu, Yun‐Peng; Chen, Dong; Zhang, Wanping; Cheng, Chen

doi:10.1109/tap.2020.3049007

Cited by 19 publications

(17 citation statements)

References 24 publications

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“…For the purpose of highlighting the performance advantages of proposed antenna, a comparison with the open literature on wideband CP patch antenna has been listed in Table 3. Even though the bandwidth of VSWR <2 in References [22,29] is slightly larger, their AR and gain bandwidth are smaller than those of the proposed antenna. Moreover, the AR bandwidth and gain bandwidth of the proposed antenna are the largest in Table 3.…”

Section: Resultsmentioning

confidence: 77%

“…24 By loading several shorting pins in square patch, the resonant frequencies of higher order modes (TM 20 , TM 30 , TM 40 , TM 50 ) are pulled down and cooperated with the dominant mode in Reference [28], a wide bandwidth of 85% is obtained. In addition, the CP radiation is implemented by circular patch in References [20][21][22][23]29]. Dual-port type is found in Reference [20], and the rest are four-port types.…”

mentioning

confidence: 99%

“…For the aim of obtaining greater bandwidth, multi-port feed mechanism is developed. [20][21][22][23][24][25][26][27][28][29] The feed position is orthogonal and the phase difference of 90 is accomplished by the feed network combining power dividers and phase shifters. Besides, the circular polarization is implemented by sequential rotating four identical patches in References [24][25][26][27], the maximum global bandwidth of 82.5% is obtained at the cost of expanded area and design complexity.…”

mentioning

confidence: 99%

“…It is worth mentioning that the antenna profile is all above 0.1λ 0 and the higher-order resonance modes have never been used to achieve broadside CP radiation in References [20][21][22][23]. While the TM 11 and TM 21 modes are used to achieve wideband CP antenna in Reference [29], only three resonance modes have been adopted. Although the dielectric resonator antenna (DRA) in Reference [30] has a simple geometry and many resonant modes, it does not achieve circular polarization.…”

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confidence: 99%

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A low‐profile and wideband circularly polarized patch antenna using four resonance modes

Liang

Lyu

Chen

et al. 2021

Int J RF Mic Comp-Aid Eng

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In this paper, a low-profile and wideband circularly polarized patch antenna using four resonance modes is presented. It is one kind of four-port antenna implemented by loading five shorting pins on the circular patch. In order to achieve wideband properties, TM 11 and TM 22 modes are stimulated in circular patch, along with their polarization orthogonal modes (TM 11+ and TM 22+ modes). The TM 11+ mode is excited by the Γ-shaped feed, while the TM 22 mode and TM 22+ mode is stimulated by four shorting pins in close proximity to the Γ-shaped feed. Due to the strong coupling between shorting pins and Γ-shaped feed, the peak electric field generated on the two opposing shorting pins causes the magnetic current density on the circumference of the patch to be changed, which in turn leads to the realization of broadside radiation in the TM 22 and TM 22+ modes. In addition, the function of the shorting pin loaded in the center of the patch is to improve the impedance matching when TM 22 and TM 22+ modes are operated. Cooperated with the devised one-to-four feed network with equal amplitude and progressive phase difference of 90 , the wideband circularly polarized patch antenna is obtained. To verify this design concept, a prototype is fabricated and measured. The diameter of the patch is 0.68λ 0 and the profile is 0.078λ 0 (λ 0 is the wavelength in the free space at the center frequency). The measured relative bandwidth of VSWR < 2 is 106%, involving 1.53-4.96 GHz, while that of AR < 3 dB is 98%, ranging from 1.54 to 4.48 GHz. Besides, the measured LHCP gain > 3 dBic in the frequency band of 1.48-4.42 GHz.

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Section: Resultsmentioning

confidence: 77%

mentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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A low‐profile and wideband circularly polarized patch antenna using four resonance modes

Liang

Lyu

Chen

et al. 2021

Int J RF Mic Comp-Aid Eng

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“…The available bandwidth is no more than 20% under the specification of VSWR <2, AR <3 dB, and gain variation <3 dB for single‐port antennas 7–9 . Thence, the multi‐port feed mechanism is developed in order to obtain greater CP bandwidth 10–18 . The spatial location and excitation phase of each port need to be carefully considered.…”

Section: Introductionmentioning

confidence: 99%

A wideband circularly polarized patch antenna based on TM ₃₁ mode and slot mode

Liang

Lyu

Chen

et al. 2022

Int J RF Mic Comp-Aid Eng

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A wideband circularly polarized patch antenna is presented in this article. The four-port antenna is composed of circular patch loaded with four shorting pins and cross-shaped slot. The realization of wideband benefits from the cooperation of three resonant modes. The lowest mode is due to the resonance of halfwavelength cross-shaped slot, while the higher two modes are TM 11 mode and TM 31 mode of the circular patch, in which the TM 31 mode is excited by loading four shorting pins. The L-shaped probes are utilized to establish the coupling feed mechanism for impedance matching in a wideband range. And the compensation of the radiation null in the broadside direction benefits from the variation of the electric field distribution caused by the shorting pins and the differential L-shaped feed structure in TM 31 mode. For the aim of implementing circularly polarized radiation in the proposed patch configuration, a phase quadrature feed network consisting of power dividers and phase shifters is designed and cooperated with this antenna. In order to verify the design concept, a prototype has been fabricated, assembled and measured. The measured results show that the relative bandwidth of VSWR <1.7 and AR <3 dB is 66.7%, ranging from 2 to 4 GHz. In addition, the measured LHCP gain >3 dBic within 2.01-3.84 GHz, and the fractional bandwidth is 61%. Moreover, the peak gain is 9.9 dBic.

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An all‐metal wideband circularly polarized single‐patch antenna based on TM₁₁ mode

Wu,

Tang,

et al. 2024

Electronics Letters

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This paper proposes an all‐metal wideband circularly polarized (CP) single‐patch antenna based on TM11 mode. The conventional square patch is divided into four small square patch units by loading metal shorting walls under the two vertical centerlines. The shorting walls are windowed to facilitate coupling between the adjacent units. When the TM11 mode is excited, the coupling windows not only distribute energy but also provide the 90° phase difference required for CP radiation. An additional feeding network is not required, and its profile is less than 0.05λ0 (λ0 is the free space wavelength at the center frequency). Three minima in the axial ratio (AR) response are present. The results show that right‐hand circularly polarized (RHCP) radiation is achieved. The measured 3 dB AR bandwidth is 6.9%, ranging from 1.52 to 1.62 GHz, and the RHCP realized peak gain is 7.72 dBic. An all‐metal construction suitable for satellite communication systems is designed that has superior performance in harsh space environments.

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A Low-Profile and Wideband Circularly Polarized Patch Antenna Based on TM₁₁ and TM₂₁

Cited by 19 publications

References 24 publications

A low‐profile and wideband circularly polarized patch antenna using four resonance modes

A low‐profile and wideband circularly polarized patch antenna using four resonance modes

A wideband circularly polarized patch antenna based on TM ₃₁ mode and slot mode

An all‐metal wideband circularly polarized single‐patch antenna based on TM₁₁ mode

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A Low-Profile and Wideband Circularly Polarized Patch Antenna Based on TM11 and TM21

Cited by 19 publications

References 24 publications

A low‐profile and wideband circularly polarized patch antenna using four resonance modes

A low‐profile and wideband circularly polarized patch antenna using four resonance modes

A wideband circularly polarized patch antenna based on TM 31 mode and slot mode

An all‐metal wideband circularly polarized single‐patch antenna based on TM11 mode

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Product

Resources

About

A Low-Profile and Wideband Circularly Polarized Patch Antenna Based on TM₁₁ and TM₂₁

A wideband circularly polarized patch antenna based on TM ₃₁ mode and slot mode

An all‐metal wideband circularly polarized single‐patch antenna based on TM₁₁ mode