Patent ID: 9615446
Date: 2017-04-04
CPC Classifications: H01P,H05K

Claim:
1. A pair of differential microstrip lines, comprising: a first microstrip line, for transmitting a first transmission signal, and the first microstrip line having a first subwavelength configuration configured by a plurality of slots arranged periodically therein; a second microstrip line, for transmitting a second transmission signal, wherein the second microstrip is parallel to the first microstrip line and has a second subwavelength configuration configured by a plurality of slots arranged periodically therein, and the second transmission signal is a complementary signal of the first transmission signal and has a 180° phase difference from the first transmission signal; a first terminal, for respectively receiving complementary signals and transmitting the complementary signals to the first microstrip line and the second microstrip line; and a second terminal, for respectively outputting the complementary signals received from the first microstrip line and the second microstrip line; wherein the plurality of slots of the first subwavelength configuration are periodically arranged along at least one side of the first microstrip line and the plurality of slots of the second subwavelength configuration are periodically arranged along at least one side of the second microstrip line, and periodical arrangement length of the plurality of slots is shorter than wavelengths of the first and the second transmission signals, whereby the first and the second subwavelength configurations provide confinement of electromagnetic field, and reduce a mode conversion effect between a differential signal and a common mode signal when the complementary signals are transmitted from the first terminal to the second terminal.