Abstract: An ultra-broadband orthogonal switchable dual-channel receive module is proposed, realizing the purpose of low-cost and light-miniaturization in microwave band by using RF multifunction substrate and metal-shelled system in package (SiP). The receive module works at P/ L/ S band, covering 5. 5 octave band, has the function of power limiting, low noise amplifying, time-delay modifying, orthogonal switching in dual channel. The receive module is fabricated and tested, noise figure is less than 1. 6 dB, small-signal gain is above 27 dB, fluctuation of gain is between -1. 6 dB and +1. 6 dB, VSWR for input/ output port is less than 1. 6, unbalance of phase and amplitude between two orthogonal channel is smaller than 8° and 0. 8 dB respectively. The module has the size of 47 mm×47 mm×5. 6 mm, and it weighs 13g.