A tunnel diode integrated E-shaped patch antenna is proposed and analyzed using equivalent circuit concept. It is found that bias voltage of tunnel diode controls the performance of the antenna. Various tunable frequency bands are obtained by selecting suitable bias voltage while antenna topology remains unchanged. Bandwidth of the tunnel diode integrated patch improves to 40.26% over the 32.58% bandwidth of the patch. The radiation pattern also varies with bias voltage and a considerable improvement in beamwidth is observed however radiated power remains almost same.
2. Nishiyama, E., M. Aikawa, and S. Egashira, "Stacked microstrip antenna for wideband and high gain," Progress In Electromagnetics Research, Vol. 33, 29-43, 2001.
doi:10.2528/PIER00091501
3. Huynh, T. and K. K. Lee, "Single layer single patch wideband microstrip antenna," Electronics Letters, Vol. 31, No. 16, 1310-1312, Aug. 1995.
doi:10.1049/el:19950950
4. Yang, F., X. X. Xhang, X. Ye, and Y. R. Samii, "Wide-band Eshaped patch antenna for wireless communications," IEEE Trans. Antenna Propag., Vol. 49, No. 7, 1094-1100, July 2001.
doi:10.1109/8.933489
5. Ang, B. K. and B. K. Chung, "A wideband E-shaped microstrip patch antenna for 5–6 GHz wireless communications," Progress In Electromagnetics Research, Vol. 75, 397-407, 2007.
doi:10.2528/PIER07061909
6. Srivastava, S., B. R. Vishvakarma, and J. A. Ansari, "Tunnel diode loaded rectangular microstrip antenna for millimeter range," IEEE trans. Antenna Propagate, Vol. 51, No. 4, 750-755, April 2003.
doi:10.1109/TAP.2003.811073
7. Bahl, I. J. and P. Bhartia, Microstrip Antennas, Artech House, Dedham, MA, 1980.
8. Xhang, X. X. and F. Yang, "Study of a slit cut on a microstrip antenna and its applications," Microwave and Optical Technology Letters, Vol. 18, No. 4, 297-300, July 1998.
9. Bahl, I. J., Lumped Elements for RF and Microwave Circuits, Artech House, Boston, 2003.
10. Woo, W. F. and F. Chow, Principles ofT unnel Diodes Circuits, Wiely, 1964.
11. Carver, K. R. and J. W. Mink, "Microstrip antenna technology," IEEE Trans. Antenna Propag., Vol. 29, No. 1, 2-23, Jan. 1981.
doi:10.1109/TAP.1981.1142523
Submit
