High-Speed Antenna Measurement System Using Multi-Probe Array Technique for 5G Applications

Profile Measurement of Resist Surface Using Multi-Array-Probe System

Semiconductor processing in manufacturing must be fast and highly accurate in the measuring of the surface profile of soft thin films such as photoresist. Since photoresist surface is very smooth and deformable, a device to measure is required that will measure vertical direction with a nanometer resolution in height and not damage the film during the measurement. To do this, we developed an ap...

Phase Frequency Detector Using Transmission Gates for High Speed Applications

In this paper a new phase-frequency detector is proposed using transmission gates which can detect phase difference less than 500ps. In other word, the proposed Phase-frequency Detector (PFD) can work in frequencies higher than 1.7 GHz, whereas a conventional PFD operates at frequencies less than 1.1 GHz. This new architecture is designed in TSMC 0.13um CMOS Technology. Also, the proposed PFD a...

Adaptive Digital Beamforming Antenna Array for High Speed Communications

The rapidly increasing demand for PCS has provided the impetus to design adaptive antenna arrays to improve spectral efficiency and enhance system capacity. With increasing data rate in some PCS application like DECT( Digital European Cordless Telecommunications), higher BER would degrade the system performance further. An adaptive antenna array testbed using 12 elements was built to evaluate i...

Propagation measurement using antenna array - Electronics Letters

antenna are shown in Fig. 2. By carefully designing the matching network, very good impedance performance is obtained. The 2 1 VSWR is obtained from 3.9 to 6.YGHz. The bandwidth is 3GHz, or 55.6%. The measured axial ratio and gain of the proposed antenna are shown in Fig. 3. The results show that from 4.8 to 6.0GHz. less than 3dB axial ratio at boresieht for the forward direction (from the grou...

Compact massive MIMO antenna array for small 5G base stations