Patent ID: 6674339
Filing Date: 2004-01-06
Classification: H01P

Abstract:
An apparatus for providing a pair of different group delays to an input signal while a frequency dependent loss in the magnitude of the input signal remains constant, regardless which one of a pair of paths said input signal takes, the apparatus comprising:a first delay component providing a first group delay to said input signal if said input signal is routed therethrough and a first frequency dependent loss to said input signal; a second delay component providing a second group delay which is shorter than said first time delay, but which has a second frequency dependent loss approximately equal to said first frequency dependent loss with substantially constant group delay; and a switch for selectively routing said input signal through either one of said first or second delay components depending on a degree of time delay desired to be imparted to said input signal; wherein at least one of said first delay component and said second delay component includes a microstrip transmission line.