Long microwave delay fiber optic link for radar testing

Frequency and temporal coherence properties of distributed Bragg reflector laser

“…The study on frequency coherence is helpful for the deep understanding of the internal properties of lightwaves and generation of narrow linewidth and stable microwave signals. Narrow linewidth and high stability are desirable in many applications, such as communications, radar, and other military and commercial fields [3][4][5][6]. For example, using microwave signal produced on a photodetector in optical heterodyne scheme to measure frequency responses of wideband photodetectors has drawn great attention.…”

“…Various dual-band antennas, such as slot and vertical strip antennas [1,2], stub antennas [3], and shorting pin antennas [4][5][6], have been proposed for WLAN systems. In particular, the shorting pin antennas were proposed [4][5][6] to obtain dual-band operation.…”

“…In particular, the shorting pin antennas were proposed [4][5][6] to obtain dual-band operation. These antennas with a shorting pin have been shown to be of great advantage by their wide bandwidth and small size for UNII applications.…”

“…In this article, a novel p-shaped dual-band microstrip patch antenna with a shorting pin smaller than 27 [1] and 43.46% [2] and thinner than 85.45 [4], 60 [5], and 71.42% [6] is proposed for 5.2/5.8 GHz WLAN systems. The experimental results for…”

A test target generator for wideband pulsed Doppler radars

“…Acoustic techniques, which can provide significant delay time, have high losses [2]. The TTS overcomes these disadvantages by using nondispersive wide-bandwidth, single-mode fiber-optic links that can provide the required delays at microwave frequencies, with the advantages of wide bandwidth, low loss, small size and weight, and immunity to EM1 [3]. A portion (upper left quadrant) of figure 1 shows a functional block diagram of the FODL.…”