Patent ID: 8350776
Filing Date: 2013-01-08
Classification: H01Q

Abstract:
1. A compact directional antenna for receiving signals over a range of frequencies having respective wavelengths comprising: a loop antenna element; a first coupler located at a first point along the loop antenna element, and configured to transfer signals from the loop antenna element; a first transmission line having a characteristic impedance, and a first end connected to the first coupler, and a second end, and operable to provide a first time delay for signals traveling from the first end to the second end; a second coupler located at a second point along the loop element, and configured to transfer signals from the loop antenna element; a second transmission line having the characteristic impedance, and a first end connected to the second coupler, and a second end, and operable to provide a second time delay for signals traveling from the first end to the second end; a signal combiner having a first port having a first impedance, and coupled to the second end of the first transmission line, and a second port having the first impedance, and coupled to the second end of the second transmission line, and a third port, and wherein the signal combiner provides a third time delay for signals traveling from the first port to the third port, and wherein the signal combiner provides a fourth time delay for signals traveling from the second port to the third port.