single oscillator and split output

For high frequency range, by using single oscillator and split output to two way with using different path length of transmissions line. For 418 MHz we need only 179.4 mm (air way length) or around 122 mm RG223-cable different path-length to make 90 degree differense between output but what shall be the impedence of lc oscillator so that we can match it with transmission line. we want this because we can find transmission line distance by using SMITH CHART.