CHAPTER 4
Antenna Arrays
Antenna arrays are groups of similar antennas arranged in various spatial configurations with relative amplitude and phase between the exciting currents or fields driving adjacent antennas chosen to give a desired radiation pattern. We will concentrate in this chapter on arrays of half-wave dipole antennas; however, many of the features of array radiation that will be uncovered are universally applicable to arrays of any type of antenna as will become clear. The chapter will conclude with a discussion of microstrip patch antennas that can be fabricated by inexpensive lithographic techniques and are replacing aperture antennas in many applications; microstrip patch antennas can be analyzed as a two-dimensional array of ...
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