Compact Four-Element Antenna Array Design for Beidou Navigation Satellite System Applications

Abstract

Abstract-In this letter, a compact four-element microstrip patch antenna array for BeiDou navigation satellite system (BDS) operation at the B3 (1268 MHz) band is proposed. High permittivity dielectric substrate and slit-loaded microstrip patch are used to reduce the antenna element size down to 40 mm × 40 mm which implies an aperture size of only λ 0 /6 × λ 0 /6 at the B3 band. The right-handed circularly polarized (RHCP) radiation is achieved by connecting two coaxial probes to a 0 • -90 • stripline hybrid. Four identical antenna elements are distributed with the same polarity and an inter-element separation of 80 mm (λ 0 /3 at the B3 band). The overall size of the antenna array, including the stripline feeding network and supporting ground plane, is only 140 mm × 140 mm × 5.5 mm. A prototype was fabricated and measured to verify the design concept. Simulated and measured results will be presented and discussed, showing that the proposed BDS antenna array is suitable for BDS applications.

A High Efficiency and Low Mutual Coupling Four-element Antenna Array for GNSS Applications

“…The proposed antenna is compared with previously published works on the basis of size, number of GNSS bands covered, isolation level, gain, and efficiency. The size of the presented antenna is significantly less than the designs reported in [14][15][16][17][18]. The proposed antenna also covers more GNSS bands than [5,[14][15][16][17] making it more robust and versatile.…”

“…The size of the presented antenna is significantly less than the designs reported in [14][15][16][17][18]. The proposed antenna also covers more GNSS bands than [5,[14][15][16][17] making it more robust and versatile. The isolation level of the proposed design is also more than described in [7,[14][15][16][17][18].…”

“…The proposed antenna also covers more GNSS bands than [5,[14][15][16][17] making it more robust and versatile. The isolation level of the proposed design is also more than described in [7,[14][15][16][17][18]. Furthermore, the gain and efficiency of our proposed design are significantly greater than the previous designs [7,8] employing an absorber that degrades these two essential parameters.…”

“…Hence, it is important to achieve a balance between isolation enhancement and maintaining sufficient gain and efficiency in such designs for robust performance. Some other GNSS designs have been reported in [14][15][16][17][18], but they suffer from large dimensions, fewer GNSS bands covered, less isolation level, less gain and design complexity compared to our presented design.…”

Diseño de antenas inteligentes

“…El uso de arreglos de antenas compactos y de pocos elementos ha cobrado gran interés en los últimos años en varias aplicaciones, por lo tanto han surgido diversas estrategias de diseño, caracterización y control, que a su vez van evolucionando con diferentes enfoques [16,52,86,113]. El criterio mayormente difundido hoy en día considera al acoplamiento mutuo entre antenas como un problema que debe ser evitado o eliminado en la medida de lo posible [51,87,89,91,92].…”