A Compact Sequential-Phase Feed Using Uniform Transmission Lines for Circularly Polarized Sequential-Rotation Arrays

2011 ◽  
Vol 59 (7) ◽  
pp. 2721-2724 ◽  
Author(s):  
Shih-Kai Lin ◽  
Yi-Cheng Lin
Keyword(s):  
Transmission Lines ◽  
Circularly Polarized ◽  
Sequential Phase

Bandwidth- and Gain-Enhanced Circularly Polarized Antenna Array Using Sequential Phase Feed

2014 ◽  
Vol 13 ◽  
pp. 1215-1218 ◽  
Author(s):  
Wenwen Yang ◽  
Jianyi Zhou ◽  
Zhiqiang Yu ◽  
Linsheng Li
Keyword(s):  
Antenna Array ◽  
Circularly Polarized ◽  
Sequential Phase

Design of Reconfigurable Patch Antenna in Frequency, Pattern, and Switchable Polarization

2020 ◽  
Vol 35 (9) ◽  
pp. 1037-1046
Author(s):  
Yan Zhang ◽  
Da Sun ◽  
Tao Dong ◽  
Jie Yin
Keyword(s):  
Transmission Lines ◽  
Patch Antenna ◽  
Tuning Range ◽  
Frequency Tuning ◽  
Bottom Layer ◽  
Frequency Pattern ◽  
Pin Diodes ◽  
Circularly Polarized ◽  
Left And Right ◽  
Switchable Polarization

In this paper, a circularly polarized frequency, pattern, and polarization switching antenna is proposed. The antenna consists of an octagonal patch, a narrow octagonal ring and four diamond-shaped parasitic patches on the top layer. Two feed points of the radiating patch are connected to a Wilkinson power divider loaded with the phase reconfigurable transmission lines on the bottom layer. Reconfiguration of the polarization and pattern is realized by using PIN diodes as switching components. By controlling the bias voltage across the varactors, various narrow frequency bands can be achieved. The proposed antenna operates at a frequency tuning range from 1.96 to 2.03 GHz. The radiation pattern can be switched among five cases in yoz-plane and xoz-plane, with the switchable polarization between left- and right-hand circular polarization. In addition, these three types of reconfiguration can be controlled independently.

scholarly journals A Compact Dual-Band Circularly Polarized Antenna with Wide HPBWs for CNSS Applications

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Chao Li ◽  
Fu-Shun Zhang ◽  
Fan Zhang ◽  
Kaiwen Yang
Keyword(s):  
Free Space ◽  
Axial Ratio ◽  
Satellite System ◽  
Dual Band ◽  
Navigation Satellite ◽  
Circularly Polarized ◽  
Horizontal Portion ◽  
Half Power ◽  
Sequential Phase ◽  
Compass Navigation

A compact dual-band circularly polarized antenna with wide half-power beamwidths (HPBWs) for compass navigation satellite system applications is proposed in this paper. The CP radiation is realized by arranging four compact dual-band inverted-F monopoles symmetrically to the center point, where the four monopoles are excited with a 90° phase offset through a compact sequential-phase feeding network. The compactness of the dual-band inverted-F monopole is realized by inserting two chip inductors in the horizontal portion of the monopole. The overall dimension of the antenna is only 0.211λ0 × 0.211λ0 × 0.057λ0, where λ0 is the corresponding free-space wavelength at 1.268 GHz. Experimental results show that the proposed antenna exhibits two overlapped impedance and axial ratio bandwidths of 50 MHz (1.236–1.286 GHz) and 40 MHz (1.532–1.572 GHz). Wide HPBWs of about 120°/125° and 121°/116° (XOZ/YOZ planes) at center frequencies (1.268, 1.561 GHz) of the CNSS-2 B3 and B1 bands are obtained, respectively. With these good performances, the antenna can be a good candidate for CNSS applications.

A Wideband Sequential-Phase Fed Circularly Polarized Patch Array

2014 ◽  
Vol 62 (7) ◽  
pp. 3890-3893 ◽  
Author(s):  
Changjiang Deng ◽  
Yue Li ◽  
Zhijun Zhang ◽  
Zhenghe Feng
Keyword(s):  
Circularly Polarized ◽  
Sequential Phase
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