Compact Dual-Band Circularly Polarized Antenna Design for Navigation Terminals

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.…”

“…Among the compact circular polarization (CP) antennas, ring patch antennas have received considerable attention because of their physically smaller size as compared to patch antennas [10,11,12,13,14,15,16,17,18,19,20,21]. In [10], a compact meandered ring patch antenna loaded with four parasitic-grounded patches and a slotted ground is proposed while its overall size is 0:285 g  0:285 g  0:035 g , more compact than the square-ring designs in [11,12].…”

“…CP operation of annular-ring patch antennas using a pair of inserted slits, two proximitycoupled L-probe feeds and an embedded circular patch are described in [13,14,15], respectively. Multiband ring antennas are proposed using nested or stacked structures and coupling feedings [16,17,18,19,20,21]. Especially, the dual-band dual CP antenna of two eccentric coplanar rings excited by an arc-shaped strip in [16] demonstrates a lower profile than the stacked structures and is structurally simpler than the aperture coupling antennas [17,18,19,20].…”

Dual‐band dual‐sense circularly polarized antenna for S‐ and C‐band applications

“…The S (2-4 GHz) and C bands (4)(5)(6)(7)(8) are broad frequency allocations designated by the IEEE and Federal Communications Commission that are used for wide range of applications such as WLAN, satellite communication, weather radar systems. Thus, the demand for a single antenna with wideband operation would be desirable since it could be used for a wide number of applications that require multiple frequency ranges within the S and C bands.…”

“…Many techniques have been reported based on crosseddipole, 1 dielectric resonator, 2,3 or stacked structures 4,5 to develop a single CP antenna with dual-band operation. However, these designs suffer from a very high profile, bulky and complicated structures, which cause many challenges for fabrication and device integration.…”