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[IEEE 2018 18th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) - Waterloo, ON (2018.8.19-2018.8.22)] 2018 18th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) - A Log-Periodic Monopole Array with Uniform Spacing
摘要： This paper presents a log-periodic monopole array antenna with end-fire radiation and vertical polarization. It consists of 13 monopole elements and a meandering microstrip line on the bottom as the feeding line. The adjacent monopoles are of uniform spacing instead of conventional logarithmic spacing. A prototype is fabricated and tested. Measured results show that an impedance bandwidth from 2 to 6 GHz (3:1) for VSWR < 2 and a realized gain better than 7.6 dBi over the same operating frequency band are obtained.
关键词： log-periodic antenna,End-fire radiation,monopole array,uniform spacing
更新于2025-09-23 15:23:52
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Folded aperture coupled patch antenna fabricated on FPC with vertically polarised end-fire radiation for fifth-generation millimetre-wave massive MIMO systems
摘要： The authors proposed a folded aperture-coupled patch antenna (ACPA) on a flexible printed circuit (FPC) with vertically polarised end-fire radiation, suitable for fifth-generation millimetre-wave massive multi-input–multi-output (MIMO) systems. For low-cost implementation, antenna elements were fabricated on a single polyimide substrate. The fabricated FPC was first folded to implement a three-layer ACPA, and then the feed line was bent 90° to achieve end-fire radiation. Measurement of five antenna samples demonstrates that the resonance frequency lies between 27.7 and 28.3?GHz. Each antenna sample has the bandwidth (|S11|?<??10?dB) >1.2?GHz. The measured antenna gain is 2.74?dBi at 28.1?GHz, and the difference between co- and cross-polarised radiation intensities is >15?dB in all directions of interest. To improve the impedance bandwidth and the gain further, they increased the distance between the patch and the aperture of the proposed antenna by folding the fabricated FPC multiple times without an additional layer. Experimental results confirm the bandwidth of 2.64?GHz (26.27–28.91?GHz) and the gain of 3.80?dBi at 28?GHz. Additionally, the 1?×?8-folded APCA array is simulated to verify the feasibility for a practical application of multi-beam massive MIMO technology.
关键词： flexible printed circuit,fifth-generation millimetre-wave,massive MIMO systems,folded aperture-coupled patch antenna,vertically polarised end-fire radiation
更新于2025-09-23 15:19:57
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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