Patent ID: 6970688
Filing Date: 2005-11-29
Classification: H01P,H04H

Abstract:
1. A local oscillator signal divider dividing a local oscillator signal into at least two branch signals to be output, comprising: a first rat race circuit dividing said local oscillator signal into branch signals to be output, said first rat race circuit including: a first annular transmission line, a first input port receiving said local oscillator signal and connected to a first node on said first annular transmission line, a first output port connected to a second node on said first annular transmission line, said second node distant from said first node in a first direction by a predetermined distance, a second output port connected to a third node on said first annular transmission line, said third node distant from said first node in a direction opposite to said first direction by said predetermined distance, and a terminator resistor connected to a fourth node on said first annular transmission line, said fourth node distant from said second node by said predetermined distance, wherein a distance from said fourth node to the third node without intersecting the first node is at least three times said predetermined distance.