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In this paper, a phased array antenna is designed at millimeter-wave frequency bands for future 5G based smartphone applications. The proposed antenna is a novel open slot-PIFA antenna made on a low cost FR4 board. The antenna array covers a frequency range of 26–32 GHz with a bandwidth of 6 GHz. The antenna exhibits a very good radiation pattern when integrated with the mobile phone chassis. The...
We present a low profile, wideband beam-steering antenna for continuous coverage of the K- and Ka-bands (18–40GHz). The array is based on the tightly coupled dipole principle and micro-electro mechanical systems (MEMS) phase shifters are integrated into each element for real-time beam forming. This topology leads to significant reduction in the size, weight, complexity, and cost of the phased array...
A phased array lens has limited bandwidth due to the phase shifters that collimate and scan the beam. A wideband signal requires time delay units in place of phase shifters. This paper investigates the feasibility of implementing time-delay units in array lens antennas. Time-delay compensation mechanisms for array lens antennas are outlined and investigations are carried to determine the required...
The impact of the phase compensation method on transmitarray (TA) performance is studied here in terms of directivity, gain, aperture efficiency, and beam scanning capability. The analysis has been done by considering generic TAs based on ideal unit-cells and illuminated by an ideal focal source with a gain of 10-dBi and 100% of efficiency. The phase compensation on the array aperture can be implemented...
This work proposes the utilization of the Reflect Array (RA) antenna in the reader of the Frequency Coded (FC) chipless RFID systems aiming at increasing the reading range, minimizing the environmental reflections and acquiring a lot of novel capabilities that can not be provided by the conventional antenna systems. The FC chipless RFID system requires an UWB range of frequencies to accommodate multiple...
This paper presents design considerations for the development of wide-scanning antennas for on-craft satellite communications. A scanning coverage of 80° is required for this application over a 15% fractional bandwidth in Ka-band. A solution based on a phased array illuminating a passive superstrate is identified as the most promising. A fully-electronic beam-scanning is considered in order to reduce...
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