Abstract

Incorporating radar detection and frequency measurement functions within a single system is highly desirable in modern RF applications. In this article, a microwave photonic system is proposed and demonstrated to simultaneously realize broadband radar detection and frequency measurement. By sharing a light with ± 2nd-order linear frequency-modulated (LFM) sidebands in a polarization-division-multiplexing manner, radar detection and frequency measurement functions can be realized simultaneously. In the transmitter, the shared light is used to generate a radar signal that has a quadrupled bandwidth compared with the input electrical LFM signal. In the receiver, the shared light is applied as the reference to perform photonic de-chirping of the radar echo and to scan the frequency of the signal under test (SUT) along two orthogonal polarization directions. In the experiment, a 4.5–6.5 GHz LFM signal is used to generate the shared light source, based on which radar detection (bandwidth: 18–26 GHz) with a range resolution as high as 2.06 cm, and frequency measurement (measurement range: 28–36 GHz) with a scanning rate of 0.8 GHz/μs and a resolution of 37.6 MHz are achieved. In addition, the reconfigurablilty of the frequency measurement range, and its capability for measuring the multi-tone and wideband signals are also demonstrated.

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription