| 摘要 |
A high order frequency multiplier is provided to remove undesired signals by reducing lengths of open and short transmission lines by half to form a predetermined length of the entire transmission line according to a fundamental frequency signal. A high order frequency multiplier(1) includes a non-linear element(10), a first open transmission line(20), a short transmission line(30), and a second open transmission line(40). The non-linear element forms harmonics in an input fundamental frequency signal. The first open transmission line attenuates undesired signals in the harmonics. A sum of lengths of the first open transmission line and the short transmission line is a predetermined length according to the fundamental frequency signal. The second open transmission line has a predetermined length according to the fundamental frequency signal. The length of each of the first open transmission line and the short transmission line is lambda/8. The sum of the lengths of the first open transmission line and the short transmission line is less than lambda. |
