Dual-band Circularly Polarized Microstrip Antenna Research Articles

Design of Dual-band Circularly Polarized Microstrip Antenna Based on Beidou Application

As satellite navigation technology and industry rapidly progressed, the demand of the navigation antenna is getting a rising increase. The antenna of multi band miniaturized navigation has become a mainstream design. This paper optimized designs a microstrip navigation antenna which works on Beidou B1 (1.561GHz) and B2 (1.207GHz) frequency band. It uses multilayer microstrip patch to achieve dual frequency work of antenna and adopts doubly fed point to realize the circular polarization of the antenna. The simulation results demonstrate that the performance of the designed Beidou antenna meets the requirements of industrial application.

DESIGN AND SIMULATION BASED STUDIES OF A DUAL-BAND CIRCULARLY-POLARIZED SQUARE MICROSTRIP ANTENNA

A dual-band circularly-polarized microstrip antenna is proposed, and the antenna for GPS is designed. The radiation characteristics of the dual-band circular polarization are achieved by installing one pair of L-shaped slits at all edges of the square patch. The impedance matching in the dual band is tuned by an L-probe feed. The proposed antenna is effective and useful in the design for dual-band circularly-polarized operation.

Stacked dual-band circularly polarized microstrip antenna with small frequency ratio

A single feed dual-band circularly polarized stacked microstrip patch antenna with a small frequency ratio is presented. The lower patch is having a pair of peripheral cuts in the circular patch with cross slot loaded at the center and truncated corner square ring is used as the parasitic patch. The frequency ratio of dual-band achieved is 1.05. The 3-dB axial ratio bandwidth is 1.4% for the upper band and 1.1% for the lower band. Proposed structure is fabricated on the FR-4 epoxy substrate and fed by SMA connector. The measured results are in good agreement with the simulated. The antenna shows stable radiation characteristics for both the operating bands. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1933–1937, 2014

Design Investigation of a Novel Dual-Band Circularly-Polarized Microstrip Antenna for 2.4 GHz and 5.7 GHz

Design Investigation of a Novel Dual-Band Circularly-Polarized Microstrip Antenna for 2.4 GHz and 5.7 GHz

Compact dual-band GPS microstrip antenna

Recently, in order to satisfy the demand for precise and reliable global positioning system (GPS) applications, the dual-band circularly polarized (CP) antenna has been developed. This paper describes a new design of a probe-fed dual-band CP microstrip antenna with two corner-truncated square patches that overlap without an air gap. Compared with the conventional dual-band CP antenna with an air-gap layer between the two patches, the volume of this antenna is reduced and its fabrication is easier. Details of the proposed antenna design and experimental results are presented and discussed. The measured results confirm the validity of this design, which can meet the requirement of GPS application at 1575/1227-MHz frequencies. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 44: 58–61, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20547