Experimental studies on a square microstrip antenna with short-circuited square rings

✍ Scribed by Jibendu Sekhar Roy; Santosh Kumar Chowdhury

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 280 KB
• Volume: 12
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19960605)12:2<79::aid-mop8>3.0.co;2-k

✦ Synopsis

Figure 8 Measured gain at 1.55 GHz for both antennas described in Figures 1 and3 The radiation patterns measured for both antennas with a rotating dipole at the central frequency of 1.5.5 GHz is shown in Figure 7. They present an axial ratio of 1.5 dB in the half-power beamwidth and are still better than 2.0 dB in the whole bandwidth and over a coverage of 90" (cf. Table 1).

The measured gain is shown in Figure 8. It is close to 9.0 dB in all frequency ranges.

V. CONCLUSION

A compact microstrip antenna has bcen realized in a low-cost technology. This antenna operates in circular polarization through a 90" branch line integrated inside the structure. Radiation pattern, bandwidth, gain, and axial ratio are not disturbed by this feed integration. So, this radiating element is a good candidate for land mobile satellite service.