Phase Locked Loop (PLL) Oscillator Circuit 860 MHz
MB501 is a 64 dividing prescaler You must patch the input of TC9122P for 2150, and 6.25kHz*2150*64 comes to 860MHz. Parts VCO made by MURATA as MQC-302-856.
Circuit DiagramThe loop filter is simple lag-lead filter The output RF signal is boosted by MMIC. The uPC1675G is not suitable for this level, you may use MAR-3 instead. Because the uPC1675G's PiMAX is 0dBm and then Po:4dBm, MQC-302-856's output of 1dBm.is over power. If you use MAR-3 instead you will get 11dBm of RF output.
I would like to use this LO for 1200 MHz to 435 MHz converter and combining with TUF-5 DBM. TUF-5 asks +7.5dBm LO input for MAX conversion gain. And on the input of DBM there should be placed PAD for decreasing distortion. 11dBm output level is adequate, so I think.
Printed Circuit Board
Local Oscillator Parts