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A technique for low-cost beam steering through direct injection of the local oscillator (LO) signal to a linear array is proposed. Design and fabrication of a single element required for realization of this frequency-scanning array are reported.
A fully-integrated 16-element 60-GHz phased-array receiver is implemented in IBM 0.12-μm SiGe BiCMOS technology. The receiver employs RF-path phase-shifting and is designed for multi-Gb/s non-line of sight links in the 60-GHz ISM band (IEEE 802.15.3c and 802.11ad). Each RF front-end includes variable-gain LNAs and phase shifters with each front-end capable of 360° variable phase shift (11.25° phase...
The Iridium satellite communications system, beginning with first launch on May 5, 1997, has provided worldwide coverage since its fully operational status in November 1998. Iridium Main Mission Antennas (MMAs) help provide this uninterrupted service. This paper describes the Iridium system and Main Mission Antenna design and provides an update on MMA mission life and continued performance. The novel...
A planar topology of UWB wide-scan array is presented, based on the class of the aperture coupled stacked patches. Performance is aimed at achieving both wide-band and wide-scan capabilities for multifunction C-X band radar applications that require modular subarray antenna architecture. The theoretical and technological aspects that affect correct design and effective realization of the array structure...
5.8 GHz circularly polarized single element patch antenna and 2 ?? 2 antenna array for RF energy harvesting were designed and fabricated. A comparison between Schottky diode and LTC5535 for RF energy harvesting rectenna (rectifying antenna) was analyzed at WLAN frequency of 5.8 GHz. Both rectennas are printed on Rogers 4003C substrate. Maximum gain at boresight tip was measured to be 3.4 dBi and 8...
This paper presents a design of an inset fed square patch array and singly fed rectangular stacked patch array operating in the 2.45 GHz ISM band for RF energy harvesting. The goal of the design is to harness and store energy from the surrounding environment which can be used in wireless sensor nodes (WSN). On the basis of simulation results obtained by FEKO simulation software, the VSWR, return loss,...
The design of a MEMS Rotman lens that uses a high dielectric constant PZT (Lead Zirconium Titanate) thick film to fill the lens cavity has been presented. The 56 mum thick Rotman lens has a footprint area of 5.5x7.1 mm2, incorporates 3 beam ports, 5 array ports, and operates at 77 GHz. The small size of the Rotman lens beamformer enables to fabricate both the transmit and receive beamformers on the...
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