T-coupled circular microstrip antenna with H-shaped aperture for active reflect-antenna applications

✍ Scribed by J. C. Liu; M. S. Chiang; T. W. Soong; M. J. Chiang; P. C. Lu

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 397 KB
• Volume: 46
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.20919

✦ Synopsis

Figure 7 that the mean RCS from 2 to 10 GHz is reduced by 4 dBsm, and an RCS reduction of approximately 4 -7 dB at a major of peak is achieved, with a 10.6-dB RCS reduction at 3.2 GHz. It is known that the RCS reduction is in opposition to increasing gain. RCS reduction can only be achieved at the expense of the gain and bandwidth of the antenna. Therefore, a tradeoff between RCS reduction and the antenna's radiation properties is necessary. The meshed microstrip patch antenna designed in this paper can be used to reduce the RCS of microstrip patch antennas only slightly at the expense of gain and bandwidth.

4. CONCLUSION

The meshed microstrip patch antenna and its application to RCS reduction have been investigated. The rules with regard to gain and resonant frequency varying with mesh line-width, mesh line-spacing, and meshing style have been studied. A meshed microstrip patch antenna with low RCS over a wide frequency range was designed. It can be seen from the numerical results that using a meshed microstrip patch antenna can effectively reduce the RCS of the solid microstrip patch antenna with only a small reduction of gain and bandwidth.