- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
A Circularly-Polarized Differentially-Fed Transmission-Line-Excited Magneto-Electric Dipole Antenna Array for 5G Applications
摘要： A differentially-fed circularly-polarized magneto-electric dipole (ME-dipole) array is proposed for 5G applications. The proposed transmission-line-excited (TLE) antenna, fabricated on a printed-circuit-board (PCB), can achieve wide impedance and axial ratio (AR) bandwidths and high gain. The antenna consists of a 2×2 ME-dipole array enclosed by a circular cavity. It is modified from our previous work on linearly-polarized (LP) array with its element orientation selectively rotated by ±45o with respect to the differentially-fed transmission line and the use of sequential rotation technique (SRT) to generate circularly-polarized (CP) radiation. A differential feed network is utilized to feed the prototype for experiments. Experiments show that the antenna can present an overlapping impedance and AR bandwidth of 32.2% from 52.2 to 72.2 GHz with a broadside left-handed CP (LHCP) gain from 10.2 to 11.8 dBic. The proposed CP antenna retains all the salient features of our previously proposed linearly-polarized (LP) antenna in symmetric and stable radiation patterns and relatively low back radiation levels.
关键词： fifth generation (5G),Circularly-polarized (CP),magneto-electric dipole (ME-dipole),differential feed
更新于2025-09-19 17:15:36
-
A Dual Linearly Polarized End-Fire Antenna Array for The 5G Applications
摘要： A dual linearly polarized antenna array with end-fire radiation at the 60-GHz band is proposed by combining two types of magneto-electric dipoles (ME-dipole) which operate in vertical polarization (V-pol) and horizontal polarization (H-pol) respectively. Based on the substrate integrated waveguide (SIW) structure, two kinds of ME-dipole are placed closely by sharing the same metallic post wall between them, achieving an element space of 0.77λ0. Besides, mutual coupling between the close elements is numerically analyzed and then suppressed by making modifications to the antenna structure. The proposed dual-polarized element achieves bandwidths of 26% and 32% (|S11| < -14 dB) for the V-pol and H-pol respectively. A 1×8 element array is designed, fabricated and measured. Good agreement is achieved between the measurement and simulation. For the V-pol excitation, a bandwidth of 21% is obtained and gain is up to 16.1 dB. For the H-pol excitation, the bandwidth is 18% and peak gain is 15.1 dB. Radiation patterns are stable over the operating frequencies with cross polarizations below -30 dB for both polarizations. The port isolation is very high above 45 dB. With all these advantages of dual polarization, end-fire radiation, stable gain and high port isolation, the proposed array is a potential candidate for the future 5G applications.
关键词： substrate integrated waveguide (SIW),end-fire radiation,Dual linear polarization,magneto-electric dipole (ME-dipole),high isolation
更新于2025-09-09 09:28:46