A Simple v-Shaped Slot Antenna With Broadband Circular Polarization

Abstract

Abstract-In this paper, a simple broadband circular polarization (CP) V-shaped slot antenna is developed. The CP antenna consists of Z-shaped feedline with a stub and a patch, and symmetrically etched two right-angled V-shaped slots (an open slot and a closed slot) along the center line. The stub is introduced for multi-resonances to obtain broadband. The broad CP and impedance bandwidths overlap by the symmetrically etched right-angled V-shaped closed slot along the center line and the Z-shaped feedline placed in a proper position. The measured results show that the proposed antenna has a broad overlapped 3-dB axial ratio (AR) bandwidth and −10 dB impedance bandwidth of 71% (2.19-4.6 GHz).

Printed Circularly Polarised Asymmetric Ultra-Wideband Antenna

“…Moreover, the radiation patterns of the antenna are stable and symmetrical in both XZ and Y Z planes. [6] 25 × 25 × 0.8 3-11.1 5.05-7.1 27.33 [7] 20 × 20 × 0.8 2.95-14 3.73-7.1 44.9 [8] 25 × 25 × 1.6 3.5-9.25 4.6-6.9 30.7 [9] 40 × 40 × 1.0 3.72-9.2 4.5-8.0 46.7 [10] 47.7 × 58 × 0.254 5.0-7.0 5.0-6.0 13.3 [11] 28 × 28 × 1.6 3.25-8 4.4-6.67 30.27 [12] 42 × 44 × 0.8 2.19-4.6 2.2-4.9 24.0 [13] 25 × 25 × 1.5 3.2-8.5 3.3-8.1 64.00 [14] 54 × 54 × 0. These antennas offered omnidirectional patterns and are highly suitable for UWB communication.…”

“…Major design strategies of antennas that have been investigated include an antenna having coplanar wave guide (CPW) fed quasi trapezoidal shaped radiating patch with two semicircular notches and two rectangular notches applied to the diagonal corners of the border ground [5], CPW fed square slot antenna with L-shape and crooked T-shape grounded strips square slot antenna [6], CPW fed square slot antenna with two corners connected by a strip line [7], antenna with a rectangular slot and horizontal stub [8], frequency selective surface backed wideband CP dual slot antenna [9], wideband CP perturbed psi shaped antenna [10], square slot antenna with antipodal Y strip [11], V shaped slot antenna [12], wideband slot antenna based on bent feed [13], slot antenna loaded by a multiple-circularsector patch [14] and a square slot antenna with dual-sense circularly polarized radiation [15]. The highest percentage ARBW coverage of the UWB spectrum obtained by the antennas under study is 64% [13].…”

“…The ground plane size and placement of the slot on the ground plane affect the antenna's behaviour, to a great extent [3]. The conventional design strategies adopted in most of the reported works in literature [5][6][7][8][9][10][11][12][13][14][15] rely on symmetric antenna design technique, where ARBW values obtained do not cover the UWB spectrum to a good extent, with structures of comparable dimensions. Even though 100% ARBW was obtained with spiral and travelling wave structures [2], dimensions of such structures are more than doubled, compared to the proposed antenna in this work.…”

Microstrip Open-Slot Antenna With Wideband Dual-Frequency and Dual-Sense Circular Polarization

“…Circularly polarized waves are powerful in satellite communications and global positioning systems, since circularly polarized waves will not be rotated like the linear polarized waves when they pass through ionosphere [1,2]. The injected power of slot antennas is transmitted to the radiation aperture through electromagnetic coupling, and the antennas have the advantages of low profile, simple structure, and wide bandwidth [3][4][5]. Slots with different shapes are etched on the conductive grounding plane of the slot antenna to excite required resonant modes and radiate power into free space.…”