Ashraf Uz Zaman
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View article: Gap Waveguide-Based MMIC Packaging Solutions for Compact RF Front-End Modules at 100 GHz
Gap Waveguide-Based MMIC Packaging Solutions for Compact RF Front-End Modules at 100 GHz Open
This paper presents two innovative packaging techniques for Monolithic Microwave Integrated Circuits (MMICs) designed for multilayer waveguide-based antennas operating near 100 GHz. The first technique involves a transition from a high-per…
View article: W-Band Filtering Antenna Based on a Slot Array and Stacked Coupled Resonators Using Gap Waveguide Technology
W-Band Filtering Antenna Based on a Slot Array and Stacked Coupled Resonators Using Gap Waveguide Technology Open
This letter proposes a new design approach for filtering antennas. The novel matching reflection coefficient based method allows the integration of filters and antennas without compromising the frequency behavior of either of these compone…
View article: Islamization in Bengal
Islamization in Bengal Open
This article investigates the historical and socio-cultural dimensions of Islamization in Bengal, shedding light on the processes that contributed to the region's Islamic transformation. Utilizing a comprehensive approach that incorporates…
View article: Millimeter Wave Wideband and Low-Loss Compact Power Divider Based on Gap Waveguide: For Use in Wideband Antenna Array System
Millimeter Wave Wideband and Low-Loss Compact Power Divider Based on Gap Waveguide: For Use in Wideband Antenna Array System Open
This paper presents a wideband and low-loss design of a compact power divider based on gap waveguide technology. The proposed power divider consists of two adjacent E-plane groove gap waveguide and a small ridge section to couple and equal…
View article: Design of a dual‐CP gap waveguide fed aperture array antenna
Design of a dual‐CP gap waveguide fed aperture array antenna Open
A slot array antenna with dual‐circular polarisation (CP) is presented in this paper. To overcome the fabrication and loss challenges in mm‐wave frequencies, the gap waveguide technique is utilised. The right and left hand circular polaris…
View article: Gapwaveguide Automotive Imaging Radar Antenna With Launcher in Package Technology
Gapwaveguide Automotive Imaging Radar Antenna With Launcher in Package Technology Open
A 77 GHz gapwaveguide radar antenna system with launcher-in-package (LiP) technology is presented in this paper for automotive imaging applications. Firstly, state-of-the-art LiP technology integrated with radar transceivers is proposed. T…
View article: Multilayer Dry Film Photoresist Fabrication of a Robust >100 GHz Gap Waveguide Slot Array Antenna
Multilayer Dry Film Photoresist Fabrication of a Robust >100 GHz Gap Waveguide Slot Array Antenna Open
This article presents the first use of a multilayer dry film photoresist to fabricate a slot array antenna by micromachining. The proposed fabrication process demonstrates a straightforward and fast method of realizing antenna structures a…
View article: A Millimeter-Wave Six-Port Junction Based on Ridge Gap Waveguide
A Millimeter-Wave Six-Port Junction Based on Ridge Gap Waveguide Open
The current paper presents a six-port low-loss waveguide coupler based on ridge gap waveguide structure with potential application in various mmWave wireless systems. The challenges in the fabrication faced in mmWave frequencies can be ove…
View article: Design and development of broadband gap waveguide‐based 0‐dB couplers for Ka‐band applications
Design and development of broadband gap waveguide‐based 0‐dB couplers for Ka‐band applications Open
The design and fabrication of a wideband millimetre‐wave 0‐dB coupler is proposed in this paper using gap waveguide technology for low‐loss and high‐power applications in 30‐GHz frequency band. To overcome the fabrication challenges in mil…
View article: A Compact Gap-Waveguide Dual-Polarized Ka-Band Feed for 50dBi Reflector Antennas With Tracking Function
A Compact Gap-Waveguide Dual-Polarized Ka-Band Feed for 50dBi Reflector Antennas With Tracking Function Open
A dual-polarized Ka-band feed based on gap waveguide (GW) technology for an ultra-high-gain reflector antenna is presented. The feed provides SUM-beams for data transfer and DIFF-beams for tracking. The whole reflector antenna is composed …
View article: Micromachined Wideband Ridge Gap Waveguide Power Divider at 220–325 GHz
Micromachined Wideband Ridge Gap Waveguide Power Divider at 220–325 GHz Open
A micromachined ridge gap waveguide power divider operating at 220-325 GHz is presented. The device is fabricated by SUEX dry film photoresist. Dry film photoresist can be used to obtain geometrical features with high accuracy using a robu…
View article: A Dual Circularly Polarized Array Antenna for Ka-Band Satellite Communications
A Dual Circularly Polarized Array Antenna for Ka-Band Satellite Communications Open
This work presents a dual circularly polarized 8-by-8 array antenna using inbuilt polarizers for satellite communications. The design consists of five metal layers, including two feeding layers for the dual circular polarizations and a pol…
View article: Dual-Polarized Highly Folded Bowtie Antenna With Slotted Self-Grounded Structure for Sub-6 GHz 5G Applications
Dual-Polarized Highly Folded Bowtie Antenna With Slotted Self-Grounded Structure for Sub-6 GHz 5G Applications Open
In this paper, a novel dual-polarized highly-folded self-grounded Bowtie antenna that is excited through I-shaped slots is proposed for applications in sub-6GHz 5G multiple-input-multiple-output (MIMO) antenna systems. The antenna consists…