
337Microwave Antennas
the induced currents in PE depends on their tuning (length) and spacing
between PEs and the DE. PE longer (by ≥5%) than DE is called the reector
and shorter to DE is called the director. The reector makes the radiation
maximum in the direction from PE to DE. The director makes the radiation
maximum in the direction from DE to PE.
9.5 Microstrip Antennas
These antennas bear many names such as patch antenna, printed antenna,
microstrip patch antenna and microstrip antenna (MSA). These are used
where thickness and conformability to the host surfaces are the key require-
ments. MSAs are becoming increasingly popula ...