Patent ID: 8928427
Filing Date: 2015-01-06
Classification: H01P,Y10T

Abstract:
1. A coupler, comprising: a first trace including a first edge substantially parallel to a second edge, the first edge substantially equal in length to the second edge, and a third edge substantially parallel to a fourth edge, the fourth edge divided into three segments including a first, second, and third segment, the first and third segments located a first distance from the third edge and the second segment located between the first and third segment a second distance from the third edge; and a second trace including a first edge substantially parallel to a second edge, the first edge substantially equal in length to the second edge, and a third edge substantially parallel to a fourth edge, the fourth edge divided into three segments including a first, second, and third segment, the first and third segments a first distance from the third edge and the second segment located between the first and third segment a second distance from the third edge, located the first distance and the second distance of the first trace and the first distance and the second distance of the second trace respectively selected to reduce coupling factor variation for a pre-determined coupling factor at a pre-determined set of frequencies, the coupling factor C the coupling factor variation Pk_dB calculated using the equation: the S ij referring to a scattering parameter of ports ij of the coupler and the Γ L referring to a normalized load impedance.