TY - JOUR
T1 - A Wideband Dumbbell-Shaped Magnetoelectric Dipole Antenna Array for Ka-Band Applications
AU - Shafiq, Shozab
AU - He, Yijing
AU - Ali, Qasim
AU - Sun, Houjun
N1 - Publisher Copyright:
© 2002-2011 IEEE.
PY - 2025
Y1 - 2025
N2 - This letter presents a novel wideband, high-efficiency dumbbell-shaped magnetoelectric dipole (DS-MED) antenna array utilizing ridge gap waveguide (RGW) technology for Ka-band applications. The array features three metal layers: a radiation layer with 8 × 8 DS-MED antenna elements, a horn-shaped coupling cavity layer acting as a 1 × 4 power divider and enhancing bandwidth, and a contactless RGW feeding network. The proposed DS-MED antenna element exhibits wideband characteristics, and has a scalable geometrical structure suitable for large planar arrays, while the horn-shaped cavity collimates the electromagnetic waves more effectively to the DS-MED elements and optimizes impedance bandwidth with additional parameters. For validation, an 8 × 8 antenna array prototype is fabricated and tested. The measurement results demonstrate a −10 dB wide impedance bandwidth of 30.3%, cross polarization below −40 dB, and peak realized gain of 28.5 dBi. The proposed DS-MED array offers wideband operation, high efficiency, and scalability to large antenna arrays for Ka-band applications.
AB - This letter presents a novel wideband, high-efficiency dumbbell-shaped magnetoelectric dipole (DS-MED) antenna array utilizing ridge gap waveguide (RGW) technology for Ka-band applications. The array features three metal layers: a radiation layer with 8 × 8 DS-MED antenna elements, a horn-shaped coupling cavity layer acting as a 1 × 4 power divider and enhancing bandwidth, and a contactless RGW feeding network. The proposed DS-MED antenna element exhibits wideband characteristics, and has a scalable geometrical structure suitable for large planar arrays, while the horn-shaped cavity collimates the electromagnetic waves more effectively to the DS-MED elements and optimizes impedance bandwidth with additional parameters. For validation, an 8 × 8 antenna array prototype is fabricated and tested. The measurement results demonstrate a −10 dB wide impedance bandwidth of 30.3%, cross polarization below −40 dB, and peak realized gain of 28.5 dBi. The proposed DS-MED array offers wideband operation, high efficiency, and scalability to large antenna arrays for Ka-band applications.
KW - Coupling cavity
KW - high-gain
KW - magnetoelectric dipole (MED)
KW - millimeter-wave (mm-Wave)
KW - ridge gap waveguide (RGW)
UR - https://www.scopus.com/pages/publications/105017436659
U2 - 10.1109/LAWP.2025.3612834
DO - 10.1109/LAWP.2025.3612834
M3 - Article
AN - SCOPUS:105017436659
SN - 1536-1225
VL - 24
SP - 4800
EP - 4804
JO - IEEE Antennas and Wireless Propagation Letters
JF - IEEE Antennas and Wireless Propagation Letters
IS - 12
ER -