Fundamental superstrate (cover) effects on printed circuit antennas

Alexopoulos, N.G.; Jackson, David R.

doi:10.1109/tap.1984.1143433

Cited by 397 publications

(157 citation statements)

References 9 publications

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“…The reasons that both gain values of the two 3DIMAs are negative may be caused by the deviation of expected dielectric constant and dielectric loss tangent of the substrate. Additionally, the resin layer cover on the 3DIMAs may also affect the antenna gain property [22,23].…”

Section: Resultsmentioning

confidence: 99%

Effect of Weaving Direction of Conductive Yarns on Electromagnetic Performance of 3D Integrated Microstrip Antenna

Yao

Zhao

et al. 2013

Appl Compos Mater

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A three-dimensionally integrated microstrip antenna (3DIMA) is a microstrip antenna woven into the three-dimensional woven composite for load bearing while functioning as an antenna. In this study, the effect of weaving direction of conductive yarns on electromagnetic performance of 3DIMAs are investigated by designing, simulating and experimental testing of two microstrip antennas with different weaving directions of conductive yarns: one has the conductive yarns along the antenna feeding direction (3DIMA-Exp1) and the other has the conductive yarns perpendicular the antenna feeding direction (3DIMA-Exp2). The measured voltage standing wave ratio (VSWR) of 3DIMA-Exp1 was 1.4 at the resonant frequencies of 1.39 GHz; while that of 3DIMA-Exp2 was 1.2 at the resonant frequencies of 1.35 GHz. In addition, the measured radiation pattern of the 3DIMA-Exp1 has smaller back lobe and higher gain value than those of the 3DIMA-Exp2. This result indicates that the waving direction of conductive yarns may have a significant impact on electromagnetic performance of textile structural antennas.

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Section: Resultsmentioning

confidence: 99%

Effect of Weaving Direction of Conductive Yarns on Electromagnetic Performance of 3D Integrated Microstrip Antenna

Yao

Zhao

et al. 2013

Appl Compos Mater

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“…It is also known that the antenna gain can be considerably increased by covering the antenna with a high permittivity superstrate [9,10]. The fundamental effects of the substrate-superstrate structure on printed-circuit antennas are explored in [11], demonstrating that the antenna radiation efficiency can be optimized to approximately 100% by selecting the proper materials and dimensions of the substrate and superstrate.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we present the detailed design of a 60 GHz left-hand circular polarized antenna [27] that has a good overall performance by combining various techniques reported in [5][6][7][8][9][10][11][12][13][14][15][16][29][30][31]. This patch antenna incorporates a diagonal slot at the center and features a superstrate and an air cavity backing to achieve desired performances including wide bandwidth, high efficiency and low axial ratio.…”

Section: Introductionmentioning

confidence: 99%

A Wideband Circularly Polarized Patch Antenna for 60 GHz Wireless Communications

Zhou¹,

Liu²,

Xin³

2012

WET

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This paper presents the design of a fully packaged 60 GHz wideband patch antenna incorporating an air cavity and a fused silica superstrate. Circular polarization (CP) is realized by introducing a diagonal slot at the center of the square patch. By optimizing the patch and the slot dimensions, a high efficiency (>90%) microstrip fed CP antenna with an impedance bandwidth of 24% and a 6 dB axial ratio bandwidth of 21.5% is designed. A coplanar waveguide (CPW) to microstrip transition with λ/4-open-ended stubs are then designed to match the antenna to the CPW packaging interface. The experimental results of the final packaged antenna agree reasonably with the simulation results, demonstrating an impedance bandwidth of more than 26% and a 6 dB axial ratio bandwidth of 22.7%.

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“…The gain and directive pattern of planar printed antennas can be improved by placing the superstrate covers at a specific distance from the antenna [1,2]. There are several configurations for the design of superstrate layer which have been attempted in past.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Cavity Reflex Antenna Using Circular Patch Type FSS Superstrate

Kotnala¹,

Juyal²,

Mittal³

et al. 2012

PIER B

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Abstract-Cavity reflex antenna (CRA) employing a circular patch type FSS (Frequency Selective Surface) superstrate is investigated. Analysis in terms of gain, bandwidth (impedance and gain) and radiation pattern has been presented. The aim of this work was to study low profile CRA having very thin superstrate sizes. In this CRA a circular patch antenna is used as a feeding source. The circular patch type FSS possesses some unique properties favorable for thin superstrate sizes. In practice when the excitation source of the CRA is a probe-fed microstrip antenna with finite ground plane, substrate and superstrate, cross-polarization increases. In the presented design, the cross polar level has been reduced by choosing the optimum air gap and superstrate geometrical and electrical properties. A CRA with circular patch type FSS offers better performance both in terms of gain and impedance bandwidth for, thin superstrates (0.008λ 0 ) while giving a gain of 13 dBi and considerably reduced crosspolar level. The proposed antenna exhibit nearly equal E-plane and H-plane radiation pattern. Measurement results are provided to support the simulated results (by Ansoft HFSS). The circular patch type FSS is easy to fabricate and can be embedded into the host profile.

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Fundamental superstrate (cover) effects on printed circuit antennas

Cited by 397 publications

References 9 publications

Effect of Weaving Direction of Conductive Yarns on Electromagnetic Performance of 3D Integrated Microstrip Antenna

Effect of Weaving Direction of Conductive Yarns on Electromagnetic Performance of 3D Integrated Microstrip Antenna

A Wideband Circularly Polarized Patch Antenna for 60 GHz Wireless Communications

Investigation of Cavity Reflex Antenna Using Circular Patch Type FSS Superstrate

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