Instantaneous frequency measurement (IFM) is one of great important technologies in modern electronic warfare. The photon-assisted IFM technology was paid particular attentions due to its huge bandwidth, low loss, small size, light weight, as well as electromagnetic inference immunity, which can overcome the bottleneck of traditional electronic methods. In this paper, another approach using complementary radio frequency power response link, is put forward to measure the wideband signal in the range of 0.5 GHz~18.5 GHz basis on our previous work. The results show that the signal gain is consistent with that of theory. Then the amplitude comparison function with more steep slope, is derived to measure the unknown signal frequency, which can improve its accuracy. The experimental results indicate that the frequency measurement error is less than 30 MHz. Moreover, this method is very simple and just a few ordinary optical devices are needed. Meanwhile, it has favorable ability to adapt the environment. By replacing the modulator and photodetector with that of higher operation frequency, it can be easily extended to work for ultra-wide band signal measurement.