scholarly journals Waveguide Slot Array Antenna with a Hybrid-Phase Feed for Grating Lobe Reduction

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Son Trinh-Van ◽  
Sung Chan Song ◽  
Seung-Hee Seo ◽  
Keum Cheol Hwang
Keyword(s):  
Millimeter Wave ◽  
Array Antenna ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Waveguide Slot ◽  
Grating Lobe ◽  
Feeding Technique ◽  
Measured Frequency Range ◽  
Aperture Distribution ◽  
Good Agreement

The design of a 112-element millimeter-wave waveguide slot array antenna to reduce the grating lobe level is presented. A hybrid-phase feeding technique combining a cophase feed and an alternating-phase feed is applied to facilitate the suppression of grating lobes. In addition, a stepped feed waveguide and offset coupling slots aligned in a line are employed to realize a tapered aperture distribution. As a result, grating lobe suppression of 8.1 dB was achieved on the diagonal planes compared to a conventional alternating-phase-fed waveguide slot array antenna. A prototype of the proposed antenna was fabricated and measured. The measured results show that the proposed antenna exhibits a −15 dB reflection bandwidth of 3.4%and an average realized gain of 26.72 dBi within the measured frequency range. Good agreement between the simulated and measured radiation patterns is also observed.

scholarly journals A Printed LPDA Antenna Fed by a Microstrip Line to Double Sided Parallel Strip Line from Backside

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Zhou Yang ◽  
Huang Jingjian ◽  
Wu Weiwei ◽  
Yuan Naichang
Keyword(s):  
Radio Frequency ◽  
Microstrip Line ◽  
Rf Circuits ◽  
Strip Line ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Dielectric Substrates ◽  
Feeding Technique ◽  
Parallel Strip ◽  
Good Agreement

A novel planar printed log-periodic dipole array (LPDA) antenna fed by tapered microstrip line (MSL) to double sided parallel strip line (DSPSL) is proposed in this paper. The proposed antenna adopts MSL feeding approach from backside. Using this feeding technique makes the printed LPDA antenna easier to be integrated into radio frequency (RF) circuits. In this paper, four layers are used to construct the antenna. The four layers of the printed LPDA antenna are printed on three thin dielectric substrates which are integrated together. To validate this approach, a printed LPDA antenna is simulated and fabricated for operating in the S and C bands (2.5–6 GHz). The antenna showed a good result over the whole frequency range with 2 : 1 VSWR, an average gain of 6.5 dB, and stable radiation patterns. The measured results are in very good agreement with simulations.

LTCC Partially-Filled Post-Wall Rectangular-Waveguide Slot Array Antenna in the Millimeter-Wave Band

2012 ◽  
Vol E95.C (10) ◽  
pp. 1635-1642 ◽  
Author(s):  
Yuanfeng SHE ◽  
Jiro HIROKAWA ◽  
Makoto ANDO ◽  
Daisuke HANATANI ◽  
Masahiro FUJIMOTO
Keyword(s):  
Millimeter Wave ◽  
Rectangular Waveguide ◽  
Array Antenna ◽  
Wave Band ◽  
Waveguide Slot ◽  
Millimeter Wave Band

Design of a waveguide slot array antenna for monopulse tracking application in millimeter wave

2015 ◽  
Author(s):  
Wentao Zhang ◽  
Fengyun Cui ◽  
Qiang Wang ◽  
Xiaoyang He ◽  
Chuanfei She ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Array Antenna ◽  
Waveguide Slot

scholarly journals Evolution of H-shaped dielectric resonator antenna for 5G applications

2019 ◽  
Vol 13 (2) ◽  
pp. 562
Author(s):  
S. Z. N. Zool Ambia ◽  
M. H. Jamaluddin ◽  
M.R. Kamarudin ◽  
J. Nasir ◽  
R.R. Selvaraju
Keyword(s):  
Millimeter Wave ◽  
Loss Tangent ◽  
Relative Permittivity ◽  
Dielectric Resonator ◽  
Impedance Matching ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Frequency Range ◽  
Feeding Technique ◽  
Slot Aperture

<span>In this paper, an H-shaped Dielectric Resonator Antenna (DRA) with a Microstrip Slot Aperture (MSA) is presented and investigated at 26 GHz. In order to widen the bandwidth operation, the slot aperture feeding technique is applied. The designed DRA with relative permittivity, εr of 10 is mounted on a Duroid substrate with a relative permittivity, εr of 2.2, loss tangent of 0.0009 and a thickness of 0.254mm. The proposed antenna with overall size of 20 x 20 x 5.27 mm3 achieves good impedance matching, gain of 7.61 dB and good radiation patterns. An impedance bandwidth of 21.44%, covering the frequency range from 24.72 GHz to 30.62 GHz made the antenna has potential for millimeter wave and 5G applications.</span>

Hex-Sided Rounded Dipole Antenna (HSRDA) For UWB Applications

Frequenz ◽  
2016 ◽  
Vol 70 (3-4) ◽  
Author(s):  
Sarthak Singhal ◽  
Nand Kishor Verma ◽  
Amit Kumar Singh
Keyword(s):  
Impedance Matching ◽  
Dipole Antenna ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Frequency Range ◽  
Antenna Structure ◽  
Simulation Results ◽  
Uwb Applications ◽  
Bow Tie ◽  
Good Agreement

AbstractA hex-sided rounded dipole antenna (HSRDA) for UWB applications is presented. It is designed by the addition of semi-elliptical patch sections at the edges of a square bow-tie antenna. The antenna structure is fed by a modified microstrip feedline for better impedance matching. An impedance bandwidth of 2.9–11.4 GHz is achieved. The antenna structure has quasi omnidirectional radiation patterns and reasonable gain over the same frequency range. A good agreement between the experimental and simulation results is observed. The proposed antenna structure has miniaturized size for the same bandwidth as compared to already reported antenna structures.

A Millimeter Wave Waveguide Slot Array Antenna for MiniSAR Application

2018 ◽  
Author(s):  
Haiqin Xu ◽  
Longan Xia ◽  
Cheng Song ◽  
Yan Heng ◽  
Xu Chen ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Array Antenna ◽  
Waveguide Slot

LTCC Oversized Rectangular Waveguide Slot Array Antenna With Air-Layer in the Radiating Part in the Millimeter-Wave Band

2013 ◽  
Vol 61 (4) ◽  
pp. 1777-1783 ◽  
Author(s):  
Yuanfeng She ◽  
Ryusuke Fujino ◽  
Jiro Hirokawa ◽  
Makoto Ando ◽  
Daisuke Hanatani ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Rectangular Waveguide ◽  
Array Antenna ◽  
Wave Band ◽  
Waveguide Slot ◽  
Millimeter Wave Band

16-element CPW Series Fed Millimeter-wave Hexagonal Array Antenna for 5G Femtocell Applications

2021 ◽  
pp. 1-15
Author(s):  
V. Harini ◽  
M. V. S. Sairam ◽  
R. Madhu
Keyword(s):  
Millimeter Wave ◽  
Return Loss ◽  
Coplanar Waveguide ◽  
Array Antenna ◽  
Single Element ◽  
Hexagonal Array ◽  
Frequency Range ◽  
Fractional Bandwidth ◽  
Indoor Communications ◽  
Element Array

Abstract A 16-element coplanar waveguide series fed hexagonal array antenna is proposed at millimeter-wave frequency range. In this paper, the analysis is initiated from a single-element hexagonal patch then extended to 1×2 array, 1×4 array, and 4×4 series fed hexagonal patch array antennas. The idea behind this design is to improve fractional bandwidth stage-wise with improved gain maintaining constant efficiency with all the structures. The 16-element array antenna is fabricated on Rogers RT Duriod 5880™ substrate with ɛ r = 2.2 and 0.508 mm thickness. This array antenna exhibits low return loss at 28 GHz with a reflection coefficient value of −31.02 dB including almost 102% radiation efficiency and attained a maximum gain value of 8.98 dBi. The results are quite comparable with simulated 4×4 array antenna using the HFSS tool. The size of the proposed antenna is quite small which will be best suited for 5 G Femtobase stations to provide indoor communications at millimeter-wave frequencies.

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