Browsing by Author "Ahmad, Wael A."

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Beam Squinting in Wideband 60 GHz On-Board Series-Fed Differential Patch Arrays
(2017-01-01)
Ahmad, Wael A.
;
Lu, Jeng-Hau
;
Kissinger, Dietmar
;
Ng, Herman Jalli
;
電信工程研究所
This paper examines the beam squinting phenomenon in millimeter-wave wideband series-fed on-board arrays with respect to the number of elements and bandwidth as an inherent scanning capability. 4-element and 6-element wideband 60 GHz differential patch arrays are designed, fabricated and measured. Both arrays cover more than 6 GHz of impedance bandwidth. The 6-element array undergoes 22 degrees beam squinting over 8 GHz with 13 dBi average gain, while the 4-element array undergoes 15 degrees squinting over 6 GHz with 11 dBi average gain.
Design and Characterization of a Differential Microstrip Patch Antenna Array at 122 GHz
(2018-01-01)
Hasan, Raqibul
;
Ahmad, Wael A.
;
Lu, Jeng-Hau
;
Kissinger, Dietmar
;
Ng, Herman Jalli
This paper presents a differential microstrip patch antenna array that operates at 122 GHz and is suitable for radar applications. The differential line was chosen in the proposed antenna due to the differential radar transceiver. The microstrip patch antenna array was designed to achieve a higher gain and bandwidth compared to a single element antenna. An 8-element series-fed array was designed, fabricated and measured. The 8-element array provides an impedance bandwidth of 14 GHz and a gain of around 13.74dBi at 122 GHz. These measurement results are also in good agreement with the simulation results.