| 摘要 |
A balanced microwave mixer for converting a microwave input signal to an intermediate frequency output using a microwave carrier as a local oscillator signal with the two microwave signals combined and divided out through two signal carrier lines via a hybrid "rat race" circuit ring. The two signal carrier lines are connected respectively one to the anode of a mixer diode and the other to the cathode of another mixer diode the opposite IF side electrodes of which are dc circuit interconnected via IF output circuitry connected thereto. Harmonic suppression filters are employed both at the inputs and outputs of the mixer diodes, and input signal quarter wavelength long outer end grounded stubs are also provided closely adjacent the mixer diodes on the RF signal input sides thereof. Low impedance RF termination stubs are provided at the diode IF outputs with each connected to an IF combining RF reactive one-quarter RF signal wavelength long stub through high impedance lines of similar length and, further, a high impedance line of similar length interconnects the IF combining stub to an RF rejection filter in turn connected to an IF amplifier.
|
