Design of tri‐notched UWB antenna based on elliptical and circular ring resonators

Abstract

This article presents the design of a compact coplanar waveguide (CPW) fed Monopole Antenna for ultra‐wideband (UWB) applications. The semi‐circular shaped radiator is fed with a 50‐Ω line that resonates within the UWB frequency range. Two notching elements are used to reduce narrowband interferences. An elliptical ring resonator is etched out from the radiator to suppress 3.97‐4.48 GHz narrowband interference whereas, narrow bands from 5.79 to 6.57 GHz (WLAN) and 7.30‐7.60 GHz (X band downlink) were suppressed by loading a metamaterial inspired circular ring resonator behind the feed line. Moreover, the lower notching band due to the elliptical ring resonator can be further tuned to lower resonance frequencies by controlling the capacitance of the embedded varactor diode. The antenna has a compact size of 36 × 34 × 1 mm3. The antenna is simulated, fabricated and measured in an Anechoic Chamber. The measured results are in good agreement with the simulated results.

Design of SWB MIMO Antenna with Extremely Wideband Isolation

“…The bandwidth (BW) ratio of SWB antennas is greater than 10:1. Multiple wideband antennas have been designed for UWB [1][2][3][4][5] and SWB [6][7][8][9][10][11][12][13][14][15] applications. The large dimensions/size of such wideband antennas is a major challenge.…”

“…The large dimensions/size of such wideband antennas is a major challenge. In [16], the dimensions of the proposed wideband antenna that resonates for a wideband range (2.67 GHz-10 GHz) are 0.56λ × 0.56λ mm 2 . Similarly in [3], a coplanar waveguide (CPW)-fed antenna has been designed for UWB applications with dimensions of 0.43λ × 0.84λ mm 2 .…”

“…In [16], the dimensions of the proposed wideband antenna that resonates for a wideband range (2.67 GHz-10 GHz) are 0.56λ × 0.56λ mm 2 . Similarly in [3], a coplanar waveguide (CPW)-fed antenna has been designed for UWB applications with dimensions of 0.43λ × 0.84λ mm 2 . Mostly the previously designed [1][2][3][4][5][6][7][8] wideband antennas have large dimensions, low % BW, and high lowest resonance frequency.…”

“…Similarly in [3], a coplanar waveguide (CPW)-fed antenna has been designed for UWB applications with dimensions of 0.43λ × 0.84λ mm 2 . Mostly the previously designed [1][2][3][4][5][6][7][8] wideband antennas have large dimensions, low % BW, and high lowest resonance frequency. For example, the dimensions of the SWB antenna designed in [6] is 2.0λ × 2.0λ mm 2 , with a 5:1 BW ratio and a %BW of 164%.…”

“…On the other hand, UWB/SWB is another technology that can provide massive data transmission rates by utilizing a very wide frequency band. Extensive research has been conducted in UWB and SWB antennas [1][2][3][4][5][6][7][8]. More advanced technology needs to be used when the required data rate reaches 1 Gigabyte per second.…”