Tunnel Diode Loaded Microstrip Antenna with Parasitic Elements

Rakesh N. Tiwari, Prabhakar Singh

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Department of Electronics and Communication Engineering, Raffles University, Neemrana, India.

DOI: 10.4236/jemaa.2012.44023                

Abstract

The present work describes the circuit model based analysis of symmetrically tunnel diode loaded microstrip antenna with parasitic elements. To optimize the antenna characteristics, a systematic study has been carried out as a function of tunnel diode bias voltage, space between parasitic patch and fed patch. The results obtained from antenna radiation pattern depict that an improvement of 5.8 MHz in bandwidth can be achieved if the symmetrically tunnel diode is loaded with patch along with parasitic elements of gap (s) = 3.6 cm. It has also been noted that at this state the radiations are more powerful i.e. 0.5647 dB as compared to single patch design.

Keywords

Microstrip Antenna; Symmetrically Tunnel Diode Loaded Patch and Parasitic Patch

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	K. R. Carver and J. W. Mink, “Microstrip Antenna Technology,” IEEE Transactions on Antennas and Propagation, Vol. 29, No. 1, 1981, pp. 2-24. doi:10.1109/TAP.1981.1142523
[2]	D. M. Pozar, “An Update on Microstrip Antenna Theory and Design Including Some Novel Feeding Techniques,” IEEE Antennas and Propagation Society Newsletter, Vol. 28, No. 5, 1986, pp. 4-9.
[3]	J. A. Ansari, R. B. Ram, S. K. Dubey and P. Singh, “A Frequency Agile Stacked Annular Ring Microstrip Antenna Using Gunn Diode,” Smart Materials and Structures, Vol. 16, No. 6, 2007, pp. 2040-2045. doi:10.1088/0964-1726/16/6/006
[4]	P. Bhartia and I. J. Bahal, “Frequency Agile Microstrip Antennas,” Microwave Journal, Vol. 25, No. 10, 1982, pp. 67-70.
[5]	G. Kumar and K. C. Gupta, “Broad-Band Microstrip Antennas Using Additional Resonators Gap-Coupled to the Radiating Edges,” IEEE Transactions on Antennas and Propagation, Vol. 32, No. 12, 1984, pp. 1375-1379. doi:10.1109/TAP.1984.1143264
[6]	I. J. Bahl and P. Bhartia, “Microstrip Antennas,” Artech House, Dedham, 1981.
[7]	W. F. Woo and. F. Chow, “Principles of Tunnel Diode Circuits,” Wiley, New York, 1969.
[8]	S. P. Sylvesten and P. Gentile, “Basic Tunnel Theory and Application of Tunnel Diode,” D. Van Nostrand, Princeton, 1962.
[9]	R. Garg and I. J. Bahal, “Microstrip Discounties,” International Journal of Electronics, Vol. 45, No. 12, 1978, pp. 81-87. doi:10.1080/00207217808900883
[10]	S. P. Gentile, “Basic Theory and Applications of Tunnel Diode,” D. Van Nostrand, Prinston, 1964.