Digest on Antennas and Propagation Society International Symposium Antennas and Propagation Society International Symposium, 1989. AP-S. Digest. :764-767 vol.2 1989
Digest on Antennas and Propagation Society International Symposium Antennas and Propagation Society International Symposium, 1989. AP-S. Digest. :760-763 vol.2 1989