Company Filing History:
2 out of 6 
1 out of 1 
1 out of 7 Years Active: 2002-2004
Title: Joseph Chandler: Innovator in Microwave Radio Technology
Introduction
Joseph Chandler is a notable inventor based in Northampton, MA (US), recognized for his contributions to microwave radio technology. With a total of four patents to his name, Chandler has made significant advancements in the field of wireless communication.
Latest Patents
Chandler's latest patents include a "High-speed point-to-point modem-less microwave radio frequency link using direct frequency modulation." This invention describes a point-to-point microwave radio link that operates in a Frequency Division Duplex (FDD) mode, utilizing direct digital modulation with a Continuous Phase-Frequency Shift Keyed (CP-FSK) scheme. The transmit signal is generated by a circuit that employs a Voltage-Control Oscillator (VCO) operating in a microwave radio band. The VCO is deviated over a narrow frequency range, which is reduced by a predetermined factor. The output of the VCO is then frequency multiplied by this factor to produce the modulated microwave output signal at the desired band. The deviation frequency of the VCO is chosen to be the reciprocal of the multiplication factor times the transport bit rate.
Another significant patent is the "Network management system access to radio frequency outdoor units in a point-to-multipoint wireless network." This system provides network management access to RF outdoor units of a point-to-multipoint wireless network. Network management signals from a network management system (NMS) are transmitted from an outdoor unit (ODU) receiver to destination ODU transmitters via modulation of a low-frequency carrier over a frequency reference interconnection carrying a frequency reference signal. The frequency of the carrier is lower than the frequency reference, avoiding any interference between the signals.
Career Highlights
Chandler has worked with YDI Wireless, Inc., where he contributed to the development of innovative wireless communication technologies. His work has been instrumental in advancing the capabilities of microwave radio systems.
Collaborations
Chandler has collaborated with Wayne E Pleasant, further enhancing his contributions to the field of microwave technology.
Conclusion
Joseph Chandler's innovative work in microwave radio technology has led to significant advancements in wireless communication. His patents reflect a deep understanding of the complexities involved in modern communication systems.