The design of compact wideband microwave reflectometers for the purpose of inclusion in a breast cancer detection system is presented. In this system, a wideband frequency source is used to synthesize a narrow pulse via the step-frequency synthesis method. The reflectometer undertakes measurements in the frequency domain and the collected data is transformed to the time/space domain using IFFT....

In this paper, Frequency divider by 2 circuit using D-flip-flop is done, based upon this a4/5 prescaler, 16/17 prescaler,32/33 prescalerareverified. Along with it the design of wide band multimodulus 320/321prescaler.CMOS single phase clock pre-scalar,wideband single phase clock 2/3 pre-scaler are also designed. A dynamic logic multiband flexible integer-N divider is designed which uses the wid...

A frequency divider based on injection-locked tunable ring oscillator is designed on 0.13-μm standard CMOS. The proposed design can achieve divide-by-4 in the frequency range of 58.75-66.3 GHz. The divider dissipates 49.5 to 54.5 mW power from a 1.5-V voltage supply. Key-Words: High-speed frequency dividers, Injection-locked tunable ring oscillator, Division range

An ultra-wide locking range transformer-based injection-locked frequency divider (ILFD) is presented. By making use of a 4-order transformer-based resonator and an inductive gain peaking technique, the proposed ILFD can achieve high performance in terms of wide locking range and low power consumption. Fabricated in a standard 65nm CMOS process with a core area of 0.18mm, the ILFD measures a loc...

A unequal Wilkinson power divider based on asymmetrical coupled line section is presented in this paper. The proposed unequal Wilkinson power divider topology uses asymmetrical coupled-line section and two transmission-line transformers. For simplification, a section asymmetrical coupled line is applied to obtain front compact matching structure. For generalization, three ports terminated imped...

The paper introduces a novel structure of dual-band filtering Wilkinson power divider (WPD). Its essential component is bandpass filter (BPF), implemented using coupling lines and two T-shaped resonators. BPF incorporated into the to suppress unwanted harmonics within circuit. latter achieved owing wide stopband filter. designed WPD can third in both channels with high levels attenuation. opera...

In this paper, the design of equal-split quad-band Wilkinson power divider is presented. The design consists of two quad-band transmission line transformers and four isolation resistors. Standard transmission line theory and even/odd modes analyses are used to obtain closed form expressions that are solved using particle swarm optimization technique to find the required divider parameters (leng...