A miniaturized rectifying circuit using microstrip lines and chip elements is proposed. The circuit is analyzed and designed using ADS2006A software. RF-DC conversion efficiency of 72\% is obtained at 5.8\;GHz with 100\;mW input power. However, the measured efficiency is much lower, which is caused by frequency shift and impedance mismatch of the ideal ADS model. By co-simulation of theory model and practical printed image, we propose inductance compensation to improve conversion efficiency. The measured value reaches 64\% at 5.7\;GHz, near the simulated result. The rectifying circuit is compact in structure and easy to be integrated. It can be used for wireless power transmission in wireless sensor networks and RFID applications.