A novel microstrip grid array antenna with both high-gain and wideband properties

作者：Feng P; Chen X; Ren X Y; Liu C J; Huang K M

来源：Progress in Electromagnetics Research C, 2012, 34.

• Center frequency
• Cluster systems
• Gain bandwidth
• Grid array antenna
• Ground planes
• High-gain
• Impedance bandwidths
• Maximum gain
• Microstripes
• Operating frequency
• Parallel genetic algorithms
• Prototype antennas
• Simulations and measurements
• Wide-band

A novel microstrip grid array antenna that is simultaneously high in gain and wide in bandwidth is proposed. To enhance its bandwidth, the antenna adopts elliptically shaped and variably dimensioned radiation elements as well as a linearly tapered ground plane, and is optimized by a parallel genetic algorithm (GA) on a cluster system. A prototype antenna was fabricated and tested. Results of simulation and measurement agree well and show the antenna exhibits encouraging properties, e.g., a maximum gain of approximately 15.1 dBi at 5.8 GHz; the S11 <-10dB bandwidth and the 3dB gain-drop bandwidth are 25.6% (from 5.03GHz to 6.51 GHz) and 27.6% (from 5.0 GHz to 6.6 GHz), respectively, of the center frequency, both of which are much wider than that of conventional microstrip grid array antennas. Moreover, the overlap between the antenna';s impedance bandwidth and the gain bandwidth results in a wide effective operating frequency bandwidth of 25.6%, which is the largest so far achieved for microstrip grid-array antennas.

• 出版日期2012
• 单位四川大学