Design of low volume circularly polarized annular ring‐shaped planar antenna for GPS applications

Abstract

A brand-new low volume design of an antenna working at three discrete bands of Global Positioning System namely L1, L2, and L5 bands with preferred right hand circular polarization (RHCP) radiation has been presented in this article.The radiator of RHCP antenna is designed by using eight 45 rotated microstrips inside the narrow width annular patch and two rectangular ground planes is incorporated on the same side of the dielectric material to exhibit a coplanar wave guide feed. The TM 11 and TM 22 modes were used to achieve RHCP radiation at global positioning system (GPS) L1 (1.5754 GHz), L2(1.2276 GHz), and L5 (1.1764 GHz) bands. This structure has low volume of 107.5 × 96 × 1.6 mm 3 , an excellent 3 dB beam-width of about 95 , 100 and 102 in θ = 0 direction and an optimum axial ratio band-width of 56 MHz (1.554-1.610 GHz), 46 MHz (1.203-1.249 GHz), and 46 MHz (1.157-1.203 GHz).The measured results of S 11 ascertained that the designed antenna is capable to efficiently work from 1.140 to 1.276 GHz (136 MHz) and from 1.545 to 1.588 GHz (43 MHz), respectively, which well suited for GPS L1, GPS L2, and GPS L5 applications.

Reconfigurable Designs of Sectoral Microstrip Antennas for Wideband and Circularly Polarized Response

“…The CP designs discussed in [16][17][18][19][20], which employ either narrow slot, stub, shorting post, or modified patch shapes, offer much lower AR BW than the proposed design. The gain reported in shorted design discussed in [18] is larger, but in this work, that of the shorted patch modes yielding CP response is not discussed.…”

“…To avoid the signal loss arising from the mismatch in between the polarization of incident wave and the receiver antenna polarization, circularly polarized (CP) antenna is used. The CP response in MSA is achieved either by cutting narrow slot in the patch, or by using modified patch shapes, or by embedding resonant slot inside the patch, or by using defected ground plane structures [16][17][18][19][20][21][22][23][24][25]. While catering to the multiple wireless applications using a single design, wideband CP MSA is required, and it is obtained by using a thicker substrate followed by the gap-coupled/stacked configurations, or the array designs [26][27][28][29].…”

Research on measurement and control method of swivel bridge across railway

“…Through satellite projection, GPS can accurately locate the ground information, thus transmitting the information to the information desk, processing the information in time, and then transmitting it to the specific terminal server to make accurate information positioning. For the principle of accurate positioning of projection information, it is to achieve accurate positioning of information through the information measurement of landmark buildings by two satellites, and to complete accurate management of information according to the accuracy differences in different tests [3][4][5]. After the completion of the construction of the construction control network across the railway bridge, this chapter introduces GPS technology to implements the control of construction measurement accuracy through the calibration of the control network.…”

Wide E-Plane Beamwidth Microstrip Patch Antenna Using H-Shaped Gap-Coupling with Three Parasitic Patches for the K-Band

“…A wide beamwidth in antennas is beneficial for maximizing the area of coverage in a point-to-multipoint wireless communication system [1], a wide scanning range of phased array systems [2], global positioning satellite (GPS) applications [3], and smart multistandard wireless devices like communication-enabled smart vehicles [4]. For the vehicle parking monitoring system using a radar sensor with wideangle object detection, the antenna should satisfy the requirement of wide beamwidth.…”