Single to Multiband Frequency Technique for Wireless and Telecomm Microstrip Antenna Design
Shelly Chawla1, Jagtar Singh2, Paras Chawla3

1Shelly Chawla, ECE Department, NCCE, Israna, Panipat, Haryana, India.
2Jagtar Singh, ECE Department, NCCE, Israna, Panipat, Haryana, India.
3Paras Chawla, ECE Department, JMIT, Radaur, Yamunanagar (Haryana), India.
Manuscript received on November 01, 2012. | Revised Manuscript received on November 02, 2012. | Manuscript published on November 05, 2012. | PP: 218-220 | Volume-2 Issue-5, November 2012. | Retrieval Number: E1047102512/2012©BEIESP
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Abstract: In this article, the variations of changing the number of rings, diameter and patch material are studied for circular ring-shape planar antenna and explore the possibility of converting a single band antenna to multiband. While doing so retain the compactness of multiband antenna. Such type of planar structure has wide potential with multiband support which is to be sight for different aerospace and telecommunication applications. A circular conductor is placed centered in the narrow annular ring having inner radius (Ri ) and outer radius (Ro ). These patterns are printed on polytetraflouroethlene (PTFE) substrate having dielectric constant 4.4, a thickness of 1.59mm, and a loss tangent of 0.020. The design laminate antenna structure consists of, a ring-shape radiating conducting material and a 50 ohm matching coaxial type feed line which work well for common resonating frequency 7.5 GHz bands. In single band the return loss value is -12.96dB and in case of dual ring the return loss value is -20.32dB at 7.5 GHz. The other band achieved in two ring is 6.5 GHz having return loss value is -21.45dB.
Keywords: Single to multiband; RF device; Microstrip antenna; Ring-shape, PTFE.