The square wave is a periodic waveform consisting of instantaneous transitions between two levels which can be denoted .
The square wave is sometimes also called the Rademacher Function. Let the square wave have period . The square
wave function is Odd, so the Fourier Series has and

The Fourier Series for the square wave is therefore

**References**

Thompson, A. R.; Moran, J. M.; and Swenson, G. W. Jr. *Interferometry and Synthesis in Radio Astronomy.* New York:
Wiley, p. 203, 1986.

© 1996-9

1999-05-26