Design of multiband multipolarised single feed patch antenna

Abstract

A new low profile, multiband, multipolarised single feed antenna is designed. A corner truncated patch loaded with slots and a complementary split ring resonator is used to achieve three frequency bands with different polarisations. The antenna exhibits right‐hand circular, linear, and left‐hand circular polarisation at three different bands, respectively. To obtain circular polarisation, orthogonal modes are excited by truncating corners of the patch and etching slits. Single feed, single layer geometry with Y‐shaped feed structure is employed. The antenna is fabricated on a low‐cost FR4 substrate with an overall size of 70thinmathspacemm×70thinmathspacemm, and the proposed design has been verified experimentally. The selected frequency bands are centred at 2.313, 2.396, and 2.478 GHz, and they have −10 dB impedance bandwidths of 2.14, 2.50, and 2.42%, respectively. The first frequency band exhibits right‐hand circular polarisation with a 3 dB axial ratio bandwidth of 0.85%. The second frequency band exhibits linear polarisation, whereas the third frequency band exhibits left‐hand circular polarisation with a 3 dB axial ratio bandwidth of 0.81%.

A Novel Dual-Band Binary Branch Fractal Bionic Antenna for Mobile Terminals

“…Various methods have been studied to obtain multiband enhancement, including slot-loaded technologies [3][4][5], coupling feed technologies [6,7], loading the matching network [8], and fractal technologies [9]. e desired resonant frequency band is produced by controlling the current path and resonant mode of the antenna radiator.…”

A Multiband antenna using plus‐shaped fractal‐like elements and stepped ground plane

“…The values of lp1 and wp1 are optimized such that the perimeter of the plus-shaped monopole provides the longest resonant path to generate a fundamental mode (one wavelength) around the center frequency (1700 MHz) at low frequency band (1630-1880 MHz). This is elaborated in Equation (1). It also generates a spurious band around 7.96 GHz (7.73-9.00 GHz) due to excitation of a higher order mode.…”

“…Also good impedance match and stable radiation patterns in the band of the interest are the basic desired characteristics of the multiband and wideband antennas. Many techniques have been extensively investigated to obtain multiband characteristics by employing radiators on the patch such as square, circular, triangular, hook‐shaped, bow‐tie patch, Y‐shaped patch, fork‐shaped radiator, or metamaterial inspired antenna . Fractal structures also can be a good candidate for designing multiband antenna as they offer scaling and self‐similarity properties and eventually help in miniaturization with multiband characteristics.…”

“…Fractal antenna geometries recently in use are Moore-shaped fractal, Apollonius circle fractal, Moore-Koch Hybrid Fractal Antenna (MKHFA), and H-shaped fractal. [9][10][11][12] In spite of many advantages, these antennas suffer from some serious drawbacks, such as large antenna dimensions, 1,[4][5][6]12 requirement of high-cost substrate materials, 5,6,10 complex structure, 5,10 or very narrow bandwidth. 2,3,[6][7][8][9]11,12 Thus, there have been considerable efforts made by researchers in designing compact, low-cost, simple, and multiband antenna.…”

Design of Miniaturized Quad-Band Dual-Arm Spiral Patch Antenna for Rfid, Wlan and Wimax Applications

“…Three main types of multiband printed antennas that have been reported in the recent few years to satisfy the aforementioned bands with compact size are monopole antennas (MAs), slot antennas (SAs), and patch antennas (PAs) [2][3][4][5][6][7][8][9][10][11]. The conventional technique for realizing multiband characteristics to these antennas is either by addition of multi-radiating elements to the patch of MS [2][3][4][5] and PA [6][7][8] or inserting slots or notches in the radiating element of SA [9][10][11]. The idea behind this technique is getting different current paths at the surface of these antennas that lead to resonating at various frequencies.…”