In this paper, we report the design and implementation of a low-noise, tunable, active microwave band pass filter (BPF) which incorporates an injection-locked Gunn oscillator. The BPF has a centre frequency of 10.30 GHz and a 3-dB bandwidth of 52 MHz. Calculation shows that this active BPF can reduce the input signal AM noise by at least 38 dB. This BPF possesses signal amplification as well as...

This report describes the completion of the studies, initiated in FY 69, carried out to assess the practicability of applying microwave integrated circuits and solid state fundamental oscillators to future sensor subsystems for radar and communications, including data relay. The X-band eight-element phased array was evaluated, a simple MIC module including a printed antenna was constructed and ...

Electro-optic spectral shearing interferometry is implemented for the highly sensitive characterization of ultrashort pulses from a free-running source. A simple phase-locked-loop clock recovery circuit is used to extract the high-frequency microwave clock signal to drive the phase modulator for spectral shearing. We demonstrate accurate full temporal characterization of 200-fs pulses from an o...

Wafer-level packaging (WLP) technology offers novel opportunities for the realisation of highquality on-chip passives needed in RF front-ends. IMEC proposes thin-film WLP technology in combination with 90nm CMOS as a cost-effective approach to integrate RF and microwave systems. The potential of this technology is assessed by means of two demonstrator sub-circuits: a low-power voltage-controlle...

A s discussed in the previous article, a frequency synthesizer can be thought of as a black box containing being properly connected, translate an input reference signal to a number of output frequencies. The synthesizer implementation as well as its ultimate performance depends heavily on characteristics of the individual components used in the design. Although there is no set definition for th...

Multiterminal Josephson junctions constitute engineered topological systems in arbitrary synthetic dimensions defined by the superconducting phases. Microwave spectroscopy enables measurement of quantum geometric tensor, a fundamental quantity describing both geometry and topology emergent Andreev bound states unified manner. In this work we propose an experimentally feasible multiterminal setu...

The research presented in this thesis is on the application of the injection-locked oscillator technique to microwave balanced oscillators. The balanced oscillator design is primarily analysed using the extended resonance technique. A transmission line is connected between the two active devices, so that the active device resonate each other. The electrical length of the transmission line is al...

Three kinds of research are pursued in the molecular beam laboratory: 1. High-precision studies of atomic and molecular hyperfine structure, an example being the recent discovery and measurement of an octopole interaction in the bromine atom. 2. The development of atomic frequency standards by using atomic and molecularbeam techniques. The carbon monoxide electric resonance studies and the ammo...

Mutually injection-locked arrays of electronic oscillators provide a novel means of controlling the aperture phase of a phased-array antenna, thus achieving the advantages of spatial power combining while retaining the ability to steer the radiated beam. In a number of design concepts, one or more of the oscillators are injection locked to a signal from an external master oscillator. The behavi...