# Davis Advanced RF Technologies Lab

#### News

» [10 Apr 2019] » Dr. Xiaomeng Gao receives the Best Young Professional Paper Award at WAMICON2019
» [01 Feb 2019] » DART Lab to Advance to Phase 3 of the DARPA SPAR Program
» [23 May 2018] » Songjie Defended his PhD Degree
» [20 Jan 2018] » DART Lab to Advance to Phase 2 of the DARPA SPAR Program
» [07 Mar 2017] » DART Lab Awarded NSF STTR Phase II Project on Developing a Radar-based Wearable Heart Health Monitoring Device
» [08 Nov 2016] » DART Lab to Participate in DARPA SPAR program

### Welcome to the Davis Advanced RF Technologies (DART) lab

We are a group of researchers with a keen interest in many exciting areas of high-frequency and high-speed electronics. Our research interests include:

• High-frequency (RF to THz) integrated circuits;
• Microelectronic and photonic devices, such as micro-electromechanical (MEMS) devices;
• Novel antennas, frequency selective surfaces, and passive components;
• Reconfigurable high-frequency circuits and systems;
• High-precision sensing systems using radar and laser time-of-flight (ToF) principles;
• Applications of high-frequency electronics to biomedical, industrial, environmental, and humanitarian problems;
• High-speed wireline and optical communications circuits.

Critical to our scientific research efforts is a pursuit of fundamental understanding of the engineering principles of high frequency electronics. A major mission of our work is to formulate and disseminate such understanding through university education as well as community outreach.

### Blog

#### [23 Oct 2018] » High-Efficiency mmW/THz Oscillator Designs - 3: Synthesizing an Oscillator from the Complex Voltage Gain A

Before we reveal more issues with Vehovec’s and Spence’s design approaches, let’s talk a little bit about how the last figure of the last post was generated, i.e. how we simulated the oscillator output power given a complex voltage gain $A$.

Using the following figure as a starting point, we note that in equilibrium, the circuit is governed by the Kirchoff’s current law, that is \begin{align}\label{eqn:kcl} I_1 + I_{1E} = 0, \nonumber \\ I_2 + I_{2E} = 0. \end{align}