A Hexagonal Ring Antenna With Dual Tunable Band-Notches for Ultra-Wideband Applications

Abstract

Abstract-An ultra-wideband hexagonal ring antenna with dual tunable band-notches is presented in this paper. The proposed antenna achieves a good impedance match (VSWR ≤ 2) covering the range of 2.5-10.6 GHz, except for the bandwidths of 3.1-3.8 GHz for WiMAX and 5.15-6 GHz for WLAN. The band-notch function is evolved by a stub and two pairs of parasitic elements for WiMAX and WLAN, respectively. The experimental results show that the band-notched characteristics can be tuned by adjusting the lengths of the stub and the two pairs of parasitic elements.

A novel design of compact wideband hexagonal antenna

“…The −10 dB return loss of SPHA ranges from 1.24 to 20 GHz, which means impedance bandwidth almost 177%. The proposed SPHA presents better impedance bandwidth comparing with reported many PHA [12–15]. The bidirectional radiation pattern in elevation and azimuth plane makes SPHA suitable for repeater application.…”

“…In several research articles, the different characteristics of planar hexagonal antenna (PHA) are studied [12–15]. The reported PHA provides wideband and omnidirectional radiation pattern in azimuth plane.…”

Microstrip feed spanner shape monopole antennas for ultra wide band applications

“…1). Provided that the lower frequency (f l ) operation is 2.98 GHz, the entire length (L) and width (W) of the proposed antenna [10,[14][15][16] are calculated by equations (1) and (2).…”