In wireless communication technology

many networking technologies use multiple frequency bands such as short-range local area wireless networks（LAN） and remote general packet radio service（GPRS）. In the debugging and detection of communication modules

near-field detection of the corresponding frequency bands is necessary. An adjustable frequency multi-band probe based on photoelectric power supply is proposed. The computer technology simulation software CST is used for modeling and optimizing of strip line based on PCB substrate. The antenna structure and size are obtained corresponding to target center frequency

and then the external adjustment circuit is adopted. The resonant frequency point of the probe is adjusted to the desired value to meet the requirements for multi-band near-field measurements. In order to reduce the influence of the external power supply on the probe

a photoelectric power source with adjustable power is selected as the energy supply of the detecting device. The actual test proves that the final made near-field probe can obtain four fixed resonant frequency points

which are located at 327. 046 MHz

693. 649 MHz

1. 699 GHz and 2. 439 GHz. The proposed probe can be widely used for near-field measurement of common wireless communication.