Wang Encheng

A Wideband Antenna for Global Navigation Satellite System With Reduced Multipath Effect

This letter presents a wideband circularly polarized patch antenna for GPS/GLONASS/BEIDOU/GALILEO systems with reduced multipath effect. The proposed antenna includes four L-probe feeds that are connected the feed network, two circular patches, and a choke ring base. The choke ring base is designed to reduce the multipath effect of the receiver. Experiment results indicate that the bandwidth of the antenna is 50.9% under S11 <; -10 dB from 1.0 to 1.7 GHz, the 3-dB axial-ratio bandwidth is 30.6% from 1.19 to 1.62 GHz, and the measured gains are all above 5 dB in the whole operating band. Moreover, low multipath effect is observed. Both simulated and measured results are presented.

An Improved Wideband Dipole Antenna for Global Navigation Satellite System

In this letter, an improved wideband dipole antenna is proposed for BEIDOU/GPS/GLONASS/GALILEO systems. The proposed antenna includes crossed narrow magneto-electric dipoles that are excited by two Γ-shaped strip probes, a 3-dB hybrid coupler, and reflecting plate. The experiment results reveal that the proposed antenna achieves a wide impedance bandwidth of 51.4% (1.1-1.85 GHz) for VSWR <; 1.5. A 3-dB axial-ratio bandwidth of 42.9% (1.1-1.7 GHz) and a gain of 5.6 ±0.6 dBi are covered by the whole operating band. Moreover, in the operating bandwidth, very stable, symmetrical radiation patterns and high gain at the low angle are obtained.

Wideband circularly polarized antenna for GPS/Glonass

In this paper, a novel circularly polarized, single-feed microstrip antenna is presented. The operating frequency can be controlled by adjusting the S-slot arm lengths and the feed point. The design has a reduced antenna size compared to the conventional circularly polarized microstrip antenna at a given operating frequency. Further more, the circularly polarized radiation quality is excellent over the entire upper hemisphere. The simulated 10dB return loss bandwidths is about 10% (1500M∼1655M), which covers the global positioning system and Glonass.

Design of a microstrip antenna for wireless video transmission system

Wireless video transmission system obtains the widespread application in the modern society. In this paper, a novel microstrip antenna is introduced for wireless video transmission system. The work includes the design of the unit antenna, the design of the antenna array. Detailed results and conclusion are given in this paper. Simulated results show that the technical specification of the antenna satisfies the wireless video transmission system.

Small low-cost production used in the course design of High-frequency Electronic Circuits

Course design of High-frequency Electronic Circuits is an important practiced process of the course,which has irreplaceable role in the realization of the training target for electronics and communications students. Through the implementation of curriculum design, students can understand the basic theoretical knowledge better; master the key technology and improve the ability of training, design thinking and innovation. Small low-cost production is the title among the courses, from which, we can arouse the practical ability of students, let students finish the processes of schematic design, component selection, circuit debugging. Students can combine theory and practical knowledge to enhance their ability and the role course design of High-frequency Electronic Circuits can be achieved really.

Design of a Novel Dual Frequency Antenna for 2.4 and 5 GHz Communication

This paper describes a novel dual-band patch antenna on organic magnetic substrate for wireless local area networks (WLAN) wireless communication (at 2.4 and 5 GHz). The dual-band operation is obtained by embedding a pair of L-shaped slots. The magnetic material is adopted because the substrate can reduce the size of antenna 40%, comparing with rectangular microstrip antennas on normal dielectric substrate, and have wider bandwidths for both bands. Details of the proposed antenna design are presented and discussed, which can be a candidate for the requirement of WLAN, operating in 2.4 and 5GHz.