Minimization of power consumption for the monitoring of mobile-WiMAX service coverage in DBDM Handsets

This paper presents a wideband active detector to scan the mobile WiMAX(㎽iMAX) service area when a ㎽iMAX+cellular DBDM terminal is out of the ㎽iMAX coverage. The device, which consists of a wideband LNA and an envelope detector to minimize the power consumption for the scanning of signal existence, is designed to detect 10㎒ of ㎽iMAX signal at 2.35㎓ with the gain of 10~11㏈. Measurement result shows 30~60㎽ of power consumption over the input power of - 50 ㏈m~ 0 ㏈m, which is significantly lower power consumption compared to the case of conventional reception with full demodulation of mWiMAX signal.