Radio frequency testing system and testing circuit utilized thereby

A radio frequency testing system comprising:

• a radio frequency signal source generating radio frequency (RF) signals;
• an antenna;
• a radio frequency testing circuit disposed on a printed circuit board (PCB), the radio frequency testing circuit comprising a first pad, a second pad, a transmission line, and at least one ground portion parallel to the transmission line, a distance between a first region defined by the first pad and a second region defined by the second pad equal to one-fourth of wavelength of the RF signal, the second region positioned between the first region and the antenna;
• a testing probe for receiving the RF signal from the radio frequency testing circuit, the testing probe electrically connected to the antenna via the radio frequency testing circuit;
• and
• a testing apparatus for testing the RF signals from the testing probe, the testing apparatus electrically connected to the radio frequency testing circuit via the testing probe;
• wherein, during testing, the testing probe is electrically connected to the first pad, and the second pad is electrically connected to ground of the PCB.