Company Filing History:
1 out of 16,092 
1 out of 8,693 
Years Active: 2008-2017
Title: Joe Qiu - Innovator in Radio Frequency Technology
Introduction
Joe Qiu is a notable inventor based in Silver Spring, MD (US). He has made significant contributions to the field of radio frequency technology, holding 2 patents that showcase his innovative approach to signal transmission and processing.
Latest Patents
One of Joe Qiu's latest patents is for a high frequency transmitter. This invention features a radio transmitter with an RF signal source. A splitter receives an input signal from the signal source and divides it into two output signals. These output signals are then fed into two phase shifters. A phase control signal is applied to each phase shifter, ensuring that the vector sum of the output signals represents the desired amplitude and phase of the transmitted signal. The outputs of both phase shifters are frequency multiplied and amplified before being recombined to form the transmitter output signal.
Another significant patent by Joe Qiu is a predistortion linearizer using cascaded lower-order linearizers. This device is designed for predistorting a radiofrequency (RF) signal. It includes a first third-order predistortion linearizer that receives the RF signal, and a second third-order predistortion linearizer connected in cascade with the first. This configuration introduces fifth order nonlinearities into a cascaded, predistorted RF output signal. By cascading additional third-order linearizers, higher-order linearizers can be achieved.
Career Highlights
Throughout his career, Joe Qiu has worked with esteemed organizations such as the United States Government, represented by the Secretary of the Navy and the Secretary of the Army. His work in these roles has contributed to advancements in military and civilian radio frequency technologies.
Collaborations
Joe has collaborated with notable colleagues, including David K Abe and Ali Mohamed Darwish. These partnerships have fostered innovation and development in the projects they have undertaken together.
Conclusion
Joe Qiu's contributions to radio frequency technology through his patents and collaborations highlight his role as a significant innovator in the field. His work continues to influence advancements in signal processing and transmission.