Compact line source generator for feeding continuous transverse stub arrays

Abstract Based on a substrate integrated lens (SIL), a compact line source generator (LSG) for feeding continuous transverse stub (CTS) arrays with linear-polarized (LP) beam scanning and dual-polarized (DP) operations is presented in this paper. The SIL consists of metamaterial cells with different sizes being arranged as concentric annulus and is printed on the center surface of two substrate layers. The SIL can convert the cylindrical wave generated by the feed probe of SIW-horn to the planar wave for feeding the CTS array. This rotationally symmetric SIL can be used conveniently to design LSG for feeding CTS arrays with the continuous beam scanning and DP operations, which has been verified by the fabrications and measurements. By simply rotating the SIW-horn along the edge of SIL, the 10-element LP-CTS array obtains a measured beam scanning range of ±35° with the highest gain of 20.6 dBi. By setting two orthogonal SIW-horns at the edge of the proposed SIL, the nine-element DP-CTS array with orthogonal radiation stubs is excited. The DP array obtains the gain of 20.3 dBi at the center frequency with the isolation of 28 dB and the cross-polarization level <−25 dB.

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A Cross Polarization Suppressed Probe fed Patch Antenna and Its Applications to Wide Angle Beam Scanning Arrays

IEEE Transactions on Antennas and Propagation ◽

10.1109/tap.2022.3140328 ◽

2022 ◽

pp. 1-1

Author(s):

Hao Chen ◽

Ke-Li Wu

Keyword(s):

Patch Antenna ◽

Wide Angle ◽

Cross Polarization ◽

Beam Scanning

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Transparent Metasurface for Generating Microwave Vortex Beams with Cross-Polarization Conversion

Materials ◽

10.3390/ma11122448 ◽

2018 ◽

Vol 11 (12) ◽

pp. 2448 ◽

Cited By ~ 10

Author(s):

Hongyu Shi ◽

Luyi Wang ◽

Mengran Zhao ◽

Juan Chen ◽

Anxue Zhang ◽

...

Keyword(s):

Transmission Loss ◽

Phase Distribution ◽

Polarization Conversion ◽

Vortex Beam ◽

Cross Polarization ◽

Measurement Results ◽

Vortex Beams ◽

Simulation Results ◽

Polarization Level ◽

Transmission Phase

In this paper, metasurfaces with both cross-polarization conversion and vortex beam-generating are proposed. The proposed finite metasurface designs are able to change the polarization of incident electromagnetic (EM) waves to its cross-polarization. In addition, they also can modulate the incidences into beams carrying orbital angular momentum (OAM) with different orders ( l = + 1 , l = + 2 , l = − 1 and l = − 2 ) by applying corresponding transmission phase distribution schemes on the metasurface aperture. The generated vortex beams are at 5.14 GHz. The transmission loss is lower than 0.5 dB while the co-polarization level is −10 dB compared to the cross-polarization level. The measurement results confirmed the simulation results and verified the properties of the proposed designs.

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Low Cross-Polarization Improved-Gain Rectangular Patch Antenna

Electronics ◽

10.3390/electronics8101189 ◽

2019 ◽

Vol 8 (10) ◽

pp. 1189 ◽

Cited By ~ 1

Author(s):

Anurag Singh ◽

Sandip Vijay ◽

Rudra Narayan Baral

Keyword(s):

Patch Antenna ◽

Frequency Selective Surface ◽

Cross Polarization ◽

Gain Enhancement ◽

Rectangular Patch ◽

Shorting Pin ◽

Half Power ◽

Broadside Radiation ◽

Polarization Level ◽

Good Agreement

In this paper, a low cross-polarization improved-gain rectangular patch antenna is presented. A patch-ground shorting pin with defected patch structure (DPS) is introduced to suppress the cross-polarization level. A High Reflective Frequency Selective Surface (HRFSS) superstrate is designed and placed over the proposed antenna at an optimized position to intensify the gain. To characterize the unit-cell of the superstrate, its transmission characteristics are extracted and discussed. Integration of the superstrate achieves a beam contraction resulting in a gain enhancement to 10.65 dBi. The proposed antenna has perfect broadside radiation with a cross-polarization level of below −30 dB in the entire half power beamwidth. The prototype of the antenna exhibits good agreement between experimental and simulated results.

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A High-Isolation Dual-Polarization Substrate-Integrated Fabry-Pérot Cavity Antenna

International Journal of Antennas and Propagation ◽

10.1155/2015/265962 ◽

2015 ◽

Vol 2015 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Chang Chen ◽

Bo-Liang Liu ◽

Ling Ji ◽

Wei-Dong Chen

Keyword(s):

Near Field ◽

Ground Plane ◽

Cross Polarization ◽

Dual Polarization ◽

High Isolation ◽

Fabry Perot ◽

Feeding Structure ◽

Operating Bandwidth ◽

High Degree ◽

Polarization Level

A dual-polarization substrate-integrated Fabry-Pérot cavity (SI-FPC) antenna is presented in this paper. The patch embedded in SI-FPC is excited with a near-field coupled feeding structure for V-polarization and with a slot-coupled feeding structure for H-polarization. The feeding structures are separated by a ground plane to improve the isolation between the ports. As a design example, an antenna operating at 10.0 GHz is fabricated and measured. A high degree of port isolation (<−40 dB) over the whole operating bandwidth (9.5–10.2 GHz) and good cross-polarization level (>25 dB) can be achieved.

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Suppression of Cross-Polarization of the Microstrip Integrated Balun-Fed Printed Dipole Antenna

International Journal of Antennas and Propagation ◽

10.1155/2014/765891 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 4

Author(s):

Huang Jingjian ◽

Zhang Xiaofa ◽

Xie Shaoyi ◽

Wu Weiwei ◽

Yuan Naichang

Keyword(s):

Frequency Band ◽

Dipole Antenna ◽

Equivalent Model ◽

Substrate Thickness ◽

Cross Polarization ◽

Engineering Applications ◽

Novel Structure ◽

The Cross ◽

Polarization Level

The high cross-polarization of the microstrip integrated balun-fed printed dipole antenna cannot meet the demands of many engineering applications. This kind of antennas has high cross-polarization levels (about −20 dB). And we find that the high cross-polarization radiation is mainly produced by the microstrip integrated balun rather than the dipole itself. The very limited method to lower the cross-polarization level of this kind of antennas is to reduce the substrate thickness. In this paper, to improve the low cross-polarized performance, firstly, an equivalent model is presented to analyze the cross-polarization radiation. Secondly, a novel structure with low cross-polarization is proposed. The microstrip integrated balun is enclosed by a center slotted cavity. The E-field of the microstrip integrated balun is transformed parallel to the dipole arms by the slot, so the radiation of the cross-polarized component is suppressed. Measured results show that this structure can achieve a bandwidth wider than 40% while reducing the cross-polarization level to less than −35 dB within the frequency band.

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