Circuit World: Volume 46 Issue 1

A broadband 23.1 ∼ 27.2 GHz doherty power amplifier with peak output power of 24.3 dBm

Yanfeng Fang, Yijiang Zhang

This paper aims to implement a new high output power fully integrated 23.1 to 27.2 GHz gallium arsenide heterojunction bipolar transistor power amplifier (PA) to meet the…

Laser micro-machined 28 GHz broad band single feed microstrip antenna for 5G mm-wave applications

Melvin C. Jose, Radha Sankararajan, Sreeja B.S., Pratap Kumar

This paper aims to propose a laser micro-machined 4 × 4 elements microstrip array antenna suitable for 5 G millimeter wave (mm-wave) applications. Each patch element of the array…

Experimental verification of volt-ampere characteristic curve for a memristor-based chaotic circuit

Li Xiong, Xinguo Zhang, Yan Chen

The ammeter can measure the direct current and low-frequency alternating current through the wires, but it is difficult to measure complex waveforms. The oscilloscope can measure…

Polarization independent bandstop frequency selective surface for X-band application

Kanchana D., Radha Sankararajan, Sreeja B.S., Manikandan E.

A novel low profile frequency selective surface (FSS) with a band-stop response at 10 GHz is demonstrated. The purpose of this designed FSS structure is to reject the X-band (8-12…

Low power LC-voltage controlled oscillator with −140 dBc/Hz @ 1 MHz offset using on-chip inductor design in 0.13 µm RF-CMOS process for S-Band application

Deepak Balodi, Arunima Verma, Ananta Govindacharyulu Paravastu

The paper aims to present the novel design approach for a low power LC-voltage-controlled oscillators (VCO) design with low phase noise that too targeted at the most sought band…

Using uniform magnetic field to obtain the constant output power and transfer efficiency for MCR-WPT

Suqi Liu, Jianping Tan

This paper aims to find an approach that achieves constant output power and transfer efficiency in an open space, such as charging pads.

Transfer characteristics of the MCR-WPT system using two series transmitting coils

Suqi Liu, Yuping Liu

The impedance compensation approaches have been adopted to achieve the maximum output power and transfer efficiency in many magnetic coupling resonance wireless power transfer…

Study and application of improved level set method with prior graph cut in PCB image segmentation

Yong Yin, Hualiang Luo, Jiming Sa, Qi Zhang

The segmentation of printed circuit board (PCB) images is an important process in PCB inspection. The circuit traces, pads and vias in a PCB are dense and curved, and the PCB…