Broadband array design in a broad sense

On the basis of our previous investigations, we present our methodology of broadband array design in a general sense, viz., the design of an array with both a frequency-invariant pattern and frequency-invariant gain at the same time along with less sensitivity to errors. We use a linear symmetric space-tapered array with frequency-dependent sensor weights that are obtained through a design procedure based on the Legendre transformation technique and maintain a desirable beam pattern within a specified frequency range. Then, based on the design of an array with frequency-invariant gain, we determine the frequency-dependent constraint parameter values that maintain desirable array gain over the same specified frequency range. Moreover, we illustrate the feasibility of the design procedure through the superposition of the gain values at the design and intermediate frequencies and the superposition of the white noise gain values at the design and intermediate frequencies.