Agency for Science, Technology and Research

National University of Singapore

Michael Yan Wah Chia

Zhi Ning Chen

Jia Sun

Chip Hong Ang

Daryl Lee Song Cher

We Peng Jason Ng

A radio frequency (RF) predistortion linearizer with a transistor and a control circuit, an input matching circuit and an output matching circuit. The control circuit is electrically coupled to a control voltage source that supplies control voltages via a control node. A resistor and a coupling inductor electrically couples the control circuit to the control node to receive the control voltages. These control voltages set two varactors of the control circuit to provide a capacitance. The capacitance and an inductance provided by an inductive block of the control circuit can thus provide a resonant frequency. This resonant frequency is thus controllable and is based on a centre frequency of an RF input signal provided to an input node of the RF predistortion linearizer.

Programmable radio frequency predistortion linearizer and method thereof

A suspended plate antenna for broadband applications is disclosed. The antenna comprises a plate radiator, a slot cut in the plate radiator, and a substantially balanced feeding structure symmetrically feeding the plate radiator with respect to at least one midline of the plate radiator.

Low cross-polarization broadband suspended plate antennas

An RF transponder having an antenna comprising at least two ports operable to receive signals such that, in use, the signals in combination establish at least two current nulls on the antenna, each of the ports being located substantially at a current null.

RF transponder

A broadband plate antenna (,) is disclosed, which includes a ground conductor (,) and a radiating element (,) which is separated from the ground conductor (,). The antenna also includes an impedance matching stub (,) electrically coupled to the radiating element (,), and means for feeding the radiating element (,), wherein the means for feeding includes a feed point (,) disposed on the impedance matching stub (,).

Growing community of inventors

Singapore, Singapore

Michael Yan Wah Chia