A dual-band circularly polarized antenna with wide HPBWs for CNSS applications

Abstract

A dual-band circularly polarized (CP) antenna with wide half power beamwidths (HPBWs) for compass navigation satellite system (CNSS) applications is proposed in this paper. The CP radiation is realized by feeding four sequentially rotated U-shape patches shorted to the ground at both ends of them with a 90°phase difference feeding network. Loading four parasitic arc-shape patches with one end shorted to the ground provides the dual-band CP operation. Experimental results show that the proposed antenna exhibits two overlapped impedance and axial ratio relative bandwidth of 2.8% and 3.3%. Wide HPBWs of over 122°at center frequencies (1.268 and 1.561 GHz) of the CNSS-2 B3 and B1 bands are obtained. With these good performances, the antenna can be a good candidate for CNSS applications.

A wideband and low-cost square radial line slot array antenna for circularly polarized applications

“…In Fig. 12, 3-dB gain bandwidth is 23.5% (15)(16)(17)(18)(19). The maximum measured right-hand CP gain is 26.7 dBic at 17.5 GHz.…”

“…For example, different types of wideband antennas with relatively good performance in published works [6,7,8,9,10,11] have been developed. However, compared with circular polarized antennas [12,13,14,15,16,17,18], these wideband linearly polarized antennas are more likely to cause polarization mismatch. And these antennas have no enough bandwidth to support high data rate transmission.…”

A wideband circularly polarized crossed magneto‐electric dipole

“…Circularly polarized (CP) antennas are widely used in wireless communication system because of better flexibility and better weather penetration over linearly polarized (LP) antennas, such as satellite communication, Wireless Local Area Network (WLAN), radio frequency identification (RFID), and Global Position Satellite (GPS) . In order to achieve high transmission rate and spectrum utilization rate in modern wireless communications, CP antennas with wide impedance bandwidth and wide axial ratio bandwidth are highly valued.…”

Design of compact active BeiDou antenna for high-shock projectile applications

“…Several effective approaches have been developed to achieve compact size for GPS/BDS antennas in the past two decades [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27]. Existing compact BDS/GPS antennas include ceramic patches [1,2,3,4], shorting probe loading antennas [5,6], slot-loaded patch and quadruple inverted-F antenna (QIFA) [7,8,9], leading to antennas as small as 0 =9.…”