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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 fundamentals of ultra-wideband (UWB) focused phased array antennas are reviewed, and some basic limitations are outlined. It is shown that when phase shifters are used within the architecture of the array, the focal point moves as a function of frequency, which degrades the focusing performance of the antenna. To mitigate these limitations, time-delay units are proposed, and it is revealed that...
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