Abstract
A microstrip array using an aperture-slot-coupling technique with very thin membranes has been developed at the L-band frequency for a beam scanning application. This technology-demonstration array with 4/spl times/2 elements achieved a relatively wide bandwidth of 100 MHz (8%) and /spl plusmn/45/spl deg/ beam scan. Very narrow coupling slots were used with each having an aspect ratio of 160 (conventional slot aspect ratio is between 10 to 30) for coupling through a very thin membrane (0.05 mm thickness). This thin-membrane aperture-coupling technique allows the array antenna elements to be more easily integrated with transmit/receive amplifier (T/R) and phase shifter modules. The paper addresses only the radiator portion of the array. The array and active components will be presented in a separate paper.
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