... they are about to enter a separate RFblock is almost mandatory. High-quality RF feed-through capacitors and entire pi-type filters are commercially available and often come as integral parts ... following:98 Antennas and Associated Hardware•Main beamwidth [at 3-dB or, sometimes, at 1-dB points (e.g., for trackingantennas)];•Sidelobe level;•Front -to- back ratio;•Polarization and polarization ... frequency, and phase. Naturally, we can use combinations as well, butthey may appear as unwanted modulations, too. The nature of the modulating, orthe baseband signal can be analog or digital [23], a...