Common Aperture Dual-Band Dual-Polarized Planar Microstrip Antenna

ABSTRACT

This paper presents the design of a common aperture dual-band microstrip antenna at 1.25 and 2.5 GHz. The antenna is dual-linear polarized at both the frequencies. The single antenna element configuration is probe-fed square annular patch at L-band and electromagnetically coupled stacked patch at S-band. L- and S-band patches are on separate layers and share the same aperture. A planar antenna has been designed using 2 × 6 elements array at L-band and 4 × 12 elements array at S-band. The antenna size is 0.36 m × 1.1 m. The measured peak gain is 16.9 dBi at 1.25 GHz and 20.7 dBi at 2.5 GHz. The cross-polarization and port to port isolations are better than 30 dB at both the frequencies.

KEYWORDS:

• Common aperture
• Dual band
• Dual-linear polarization
• Microstrip antenna and synthetic aperture radar

ACKNOWLEDGEMENTS

The authors thank the Director of SAC for support and encouragement. The authors also thank all the MSAD engineers for their help and support.

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

B. K. Pandey

B. K. Pandey graduated in electronics and communication engineering from Madan Mohan Malviya Engineering College, Gorakhpur, in 1999 and post graduated in electronics and telecommunication engineering from Jadavpur University in 2001. Presently, he is working at the Space Applications Centre, ISRO. His present areas of research are the design of planar microstrip antennas and multi-frequency multi-polarization antennas for airborne and space-borne applications.

S. B. Chakrabarty

S. B. Chakrabarty obtained his BE (Hons) degree from Gauhati University in 1988, ME degree from Jadavpur University in the year 1992 both in electronics and telecommunication engineering, and PhD degree in engineering from the Indian Institute of Technology, Kharagpur in the year 1996. He is currently working for the Antenna Systems Area, Space Applications Centre, Ahmedabad as senior scientist/engineer and as the divisional head for the Microwave Sensors Antenna Division. He is involved in the development of antennas related to microwave remote sensing and his areas of interest are computational electromagnetics, microwave, and millimeter-wave antennas.

E-mail: [email protected]

Rajeev Jyoti

Rajeev Jyoti did his MSc degree from Delhi University in 1984 and completed his MTech degree from Delhi University in 1986. He has an experience of more than 20 years in the design, analysis, and development of microwave antennas systems required at the Space Applications Centre (SAC), Ahmedabad for ground- and space-borne antennas for communication and remote-sensing satellites. He has been at the ESTEC, European Space Agency (ESA) Netherlands for 14 months as UN fellow on antenna and propagation. He has developed antenna systems for Indian Satellite INSAT4A /4B/4C & RISAT, GSAT series of satellite namely Education satellite, GSAT 1, GSAT2, and GSAT4. He has developed antenna technologies for earth station antenna system for building INSAT-based ground antenna systems.

E-mail: [email protected]