Tri-Band Concentric Slot-Ring Antenna with Ultra-Wide Frequency Tunability for Cognitive Radio Applications
Monika Tulsyan1, Rajarshi Bhattacharya2

1Monika Tulsyan, Ph.D. Scholar, Department of ECE, NIT Patna, Patna (Bihar), India.
2Rajarshi Bhattacharya, Assistant Professor, Department of ECE, NIT Patna, Patna (Bihar), India.

Manuscript received on 18 June 2019 | Revised Manuscript received on 25 June 2019 | Manuscript published on 30 June 2019 | PP: 239-242 | Volume-8 Issue-5, June 2019 | Retrieval Number: D6188048419/19©BEIESP
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Abstract: This paper presents a compact, triband, rectangular slot-ring frequency reconfigurable antenna designed on FR-4 board having dimension 43 x 48 x 1.56 mm3 . Two concentric slot-rings are placed such that their mutual interaction leads to triband operation of the antenna. Frequency reconfigurability is achieved by reactive loading of each slot-ring with varactor diode. The proposed antenna could be continually tuned over ultra-wide frequency range from 1.91-5.9 GHz. The antenna covers major wireless standard bands such as Bluetooth (2.38-2.49), Wi-Max (3.3-3.6), WLAN (5.15-5.725), LTE 2300/2600 and Wi-Fi (2.4–2.5). Hence, the designed antenna is appropriate for handheld mobile terminals for cognitive radio based applications
Keywords: Cognitive Radio, Frequency Reconfigurable, Slot-Ring Antenna, Ultra Wideband Tuning.

Scope of the Article: Cognitive Radio Networks