For cw-operation active elements need an efficient heat sink and mounting requires absorption of the back side ... antennas backed by a ground plane due to the strong excitation of parallel-plate waveguide modes are reported in [2, 5]. ... To avoid parasitic resonances care has been taken to contact exactly in the middle of the slot The measurements have been performed on a HP 8753 network analyzer.
|Title||:||1993 international symposium digest|
|Author||:||IEEE Antennas and Propagation Society|
|Publisher||:||IEEE - 1993|