Dual Complementary Source Magneto-Electric Dipole Antenna Loaded With Split Ring Resonators

Abstract

In this paper, a magneto-electric (ME) dipole antenna excited by two slots through a printed ridge gap waveguide (PRGW) is presented. This antenna, which operates in the Ka-band, is considered as a dual complementary source (DCS), and exhibits a higher gain and a wider impedance bandwidth, compared to conventional ME dipoles. The proposed antenna has an impedance matching bandwidth with |S 11 | < −10 dB from 24.5 to 40 GHz with a stable gain of 10±1 dBi over the 25-35 GHz band. Moreover, by integrating horizontally three layers, each with an array of 4 × 10 split-ring resonator (SRR) unit cells on top of the DCS-ME dipole antenna, the realized gain is increased while maintaining the impedance bandwidth of the antenna. The antenna was fabricated and measured to confirm the simulation results. The fabricated prototype has a size of 1.1 × 1 × 0.58 λ 3 (at 30 GHz) and exhibits a measured impedance bandwidth in excess of 50%, from 24 to 40 GHz, a maximum measured gain of 14.2 dBi at 35 GHz, and a measured radiation efficiency of 93% at 30 GHz. INDEX TERMS 5G wireless networks, high gain magneto-electric dipole antenna, millimeter-wave antennas, printed ridge gap waveguide (PRGW), split-ring resonator (SRR).

Ultra-Wideband Hybrid Magneto-Electric Dielectric-Resonator Dipole Antenna Fed by a Printed RGW for Millimeter-Wave Applications

“…Several articles have introduced MEdipole to cover wideband operation around 30 GHz based on printed ridge gap waveguide, packaged microstrip line, and substrate integrated gap waveguide technologies [19], [21], [23]. The bandwidth of such designs is around 20% with a gain in the range of 5 to 8 dB with large variation over the operating bandwidth.Other designs enhanced both the gain and the bandwidth through loading the ME-dipole with Split Ring Resonators (SRR) or PMC surfaces [8], [20], [22], [24]. These techniques can widen the bandwidth up to 40 % and increase the gain by 2 dB.…”

“…For example, some presented antenna structures have sacrificed the bandwidth to provide a high gain solution [8], [20]- [22]. Others proposed antenna configurations that cover a wide bandwidth, nonetheless, with unstable gain [23], [24]. Moreover, most of the published configurations that have deployed dielectric resonator structures do not maintain symmetrical radiation characteristics over a wide operating bandwidth [25]- [27].…”

Symmetric Engineered High Polarization-Insensitive Double Negative Metamaterial Reflector for Gain and Directivity Enhancement of Sub-6 GHz 5G Antenna

“…However, in this article, an asymmetric shaped MM surface has been employed on top of an existing LPDA antenna with inefficient lower band gain. The paper [31] demonstrated a metasurface-loaded DCS-ME dipole antenna with high gain for Ka-band applications, in which the authors employed three layers of metasurface on the antenna's top to improve the gain. NZIM metamaterial is utilized to enhance the gain of the patch antenna in [32], where the gain is increased by almost 1 dB at the maximum frequencies.…”

Wideband split-ring antenna arrays based on substrate integrated waveguide for Ka-band applications

“…According to [15], the designed split-ring resonator based on a rectangular ring structure achieves a fractional bandwidth of 36% centered at 140 GHz and it is implemented as a wideband transition between rectangular waveguide and coplanar waveguide (CPW). In [34], the split-ring resonators are placed on top of a dipole antenna for gain enhancement at Ka band, while the bandwidth of the dipole antenna is maintained.…”