Low-profile design of dual-frequency and dual-polarised triangular microstrip antennas

Row, Jeen‐Sheen; Lin, Kai-Chi

doi:10.1049/el:20040122

Cited by 18 publications

(16 citation statements)

References 3 publications

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“…Multiband antennas with the same polarization in all bands are often realized using microstrip antennas [1], monopole antennas [2,3], slot antennas [4], reconfigurable antennas [5], etc. Multi-band antennas with dual polarization performance have also been realized [6][7][8][9]. In [6], a triangular microstrip antenna realizes dual-band dual-polarized function.…”

Section: Introductionmentioning

confidence: 99%

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Compact Tri-Band Dual-Polarized Planar Monopole Antenna With Asymmetrical Ground Plane and Loaded Stub

Tan¹,

Wang

Zhang³

2016

PIER Letters

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Abstract-This paper presents a compact tri-band dual-polarized planar monopole antenna, which is linearly polarized in the lower and middle bands and circularly polarized in the higher band. The antenna is printed on a substrate with an asymmetrical ground plane and a loaded vertical stub. The vertical stub and asymmetrical ground plane are mainly used to make the antenna obtain circular polarization performance in the higher band. The antenna has been built and tested. Its measured 10-dB impedance bandwidths are 2.39-2.54 GHz, 3.38-4.12 GHz, and 4.57-6.04 GHz, which can fully cover all the 2.4/5.2/5.8 GHz WLAN bands, all the 2.4/5.5 GHz Wi-Fi bands, and 3.5/5.5 GHz WiMAX bands. In the higher band, the measured 3-dB axial-ratio bandwidth is 5.4-5.83 GHz.

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Section: Introductionmentioning

confidence: 99%

“…Multi-band antennas with dual polarization performance have also been realized [6][7][8][9]. In [6], a triangular microstrip antenna realizes dual-band dual-polarized function. In [7], a stacked-patch dual-polarized antenna is designed for triple-band handheld terminals.…”

Section: Introductionmentioning

confidence: 99%

Compact Tri-Band Dual-Polarized Planar Monopole Antenna With Asymmetrical Ground Plane and Loaded Stub

Tan¹,

Wang

Zhang³

2016

PIER Letters

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“…Omnidirectional antennas are very useful for communication where relative direction between transmit and receive antenna is not known or changes continuously and randomly [1][2][3]. Circularly Polarized (CP) omnidirectional antennas increase the reliability of communication system [2,[4][5][6][7] because depolarization of electromagnetic (EM) waves due to scattering and diffraction does not deteriorate the reception in circular polarization as adversely as in linear polarization [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…In free space propagation, a polarization misaligned CP antenna will give a maximum of 3 dB loss. Most omnidirectional antennas are linearly polarized or dual linearly polarized [3,[15][16][17][18], of which many configurations require ground plane [9][10][11][12][13][14][15][16][17][18][19][20][21]. Similarly CP omnidirectional antennas are of two categories, one which require ground plane (slot type or monopole type) [2,5,[22][23][24][25] and other which do not require ground plane (frequency independent antennas, Quadrifilar Helix Antenna (QHA) and orthogonally oriented vee dipoles) [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Design of Circularly Polarized Omnidirectional Bifilar Helix Antennas With Optimum Wide Axial Ratio Beamwidth

Yousaf¹,

Amin²,

Iqbal³

2013

PIER C

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Abstract-In this paper, design and analysis of omnidirectional single feed circularly polarized, wide axial ratio beamwidth resonant side-fed bifilar helix antennas that do not require a ground plane is presented. The simulation and measurement results show that side-fed helix antennas of various radii gives near perfect circular polarization (CP) almost over the whole sphere except at and around nulls, at a certain turn angle by properly proportioning the area of loop (A) with the product of pitch (ρ) and radianlength (l ) of helix. Helix antennas with smaller radii give axial ratio (AR) close to one at higher values of turn angle with lower value of resonant input impedances but CP is less sensitive to inaccuracy in turn angle. However helix antennas with larger radii results in AR close to one at lower values of turn angle and provides better values of input resistance but its AR is more sensitive to variations in turn angle. The simulated results show that the polarization solid angle beamwidth (for AR ≤ 3 dB) varies from 3.96π to 4π steradian. The gain and 3 dB beamwidth of the antennas are 2 dBi and 90 • respectively. The polarization bandwidth varies from 34% to 65%. The simulated results are verified by experimental measurements.

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“…GPS 신호를 수신할 때 전파환경에 의한 위상 왜곡이 발생하게 되는데 [16] , 이를 보다 정확히 보정 하기 위해서 GPS 안테나는 이중대역에서 동작하며 [17] , 위 성의 위치 또는 멀티패스 등에 따른 수신율 저하를 방지 하기 위해 가능한 넓은 빔폭을 가지고, 우선회 원형편파 복사특성을 가지도록 설계한다 [1], [2], [5], [14] . 소형 이중대역 GPS 안테나에 대한 연구로서 패치 안테나가 많이 연구되 고 있고, 이를 급전구조에 따라 분류하면 GPS L1/L2 대역 의 공진부에 모두 직접급전되는 경우 [4] , 한 대역의 공진 부에 직접급전되며 커플링의 형태로 다른 대역의 공진부 에 간접급전되는 경우 [5] , 그리고 두 대역의 공진부에 모 두 간접급전되는 경우 [6] 의 3가지로 구분할 수 있다. 직접 급전을 포함하여 설계된 안테나의 경우, 급전 핀과 직접 연결된 공진 패치가 임피던스 매칭에 영향을 주어, 공진 주파수 튜닝이 어렵고, 매칭 대역폭이 협소한 단점이 있 다.…”

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Design of Dual-Band GPS Array Antenna Using In-Direct Feeding Pad

강승석¹,

서승모²,

변강일³

et al. 2017

J. Korean Inst. Electromagn. Eng. Sci.

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In this paper, we propose the design of a dual-band GPS antenna using in-direct feeding pads. The antenna consists of an upper patch for the GPS L1 band, a lower patch for the GPS L2 band, and two pads on the middle layer for feeding the two radiating patches. A hybrid chip coupler with a phase difference of 90° is employed at the two feeding ports for achieving a broad circular polarization (CP) bandwidth. The proposed antenna shows bore-sight gains of 3.0 dBic(L1) and 5.1 dBic(L2), and axial ratios of 3.3 dB(L1) and 0.3 dB(L2) by measurement. The active element patterns of the fabricated array with 7 elements show bore-sight gains of -0.4 dBic (L1) and -2.4 dBic(L2), respectively. It proves that the proposed antenna structure is suitable for use in GPS array applications.

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Low-profile design of dual-frequency and dual-polarised triangular microstrip antennas

Cited by 18 publications

References 3 publications

Compact Tri-Band Dual-Polarized Planar Monopole Antenna With Asymmetrical Ground Plane and Loaded Stub

Compact Tri-Band Dual-Polarized Planar Monopole Antenna With Asymmetrical Ground Plane and Loaded Stub

Design of Circularly Polarized Omnidirectional Bifilar Helix Antennas With Optimum Wide Axial Ratio Beamwidth

Design of Dual-Band GPS Array Antenna Using In-Direct Feeding Pad

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