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For the Inventor, By the Inventor

Lexington, MA, United States of America

George H MacMaster

This inventor holds 20 USPTO granted patents and 1 published patent application. Top assignee: Raytheon Company. Active years: 1976-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: George H MacMaster. Retrieved from https://idiyas.com/inventor/george-h-macmaster

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 20 

% Patents Active = 100.0

Average Co-Inventor Count = 2.1

ph-index = 9

Forward Citations = 323(Granted Patents)


Company Filing History:

goldMedal20 out of 8,313 
 
Raytheon Company
 patents

Years Active: 1976-1993

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20 patents (USPTO):Explore Patents
1. 5196765 - High RF isolation crossed-field amplifier (1993-03-23),
2. 5142253 - Spatial field power combiner having offset coaxial to planar (1992-08-25),
3. 4928070 - Low-noise crossed-field amplifier (1990-05-22),
4. 4763043 - P-N junction semiconductor secondary emission cathode and tube (1988-08-09),
5. 4742271 - Radial-gain/axial-gain crossed-field amplifier (radaxtron) (1988-05-03),
6. 4677342 - Semiconductor secondary emission cathode and tube (1987-06-30),
7. 4434387 - DC Isolated RF transition for cathode-driven crossed-field amplifier (1984-02-28),
8. 4429286 - Divider/combiner amplifier (1984-01-31),
9. 4424496 - Divider/combiner amplifier (1984-01-03),
10. 4349791 - Slow wave coupling circuit (1982-09-14),
11. 4296298 - Dielectric cooking apparatus (1981-10-20),
12. 4283685 - Waveguide-to-cylindrical array transition (1981-08-11),
13. 4282492 - Modular multiple channel signal processor (1981-08-04),
14. 4282491 - Amplifier with severed transmission lines (1981-08-04),
15. 4272740 - Coaxial-to-cylindrical array transition (1981-06-09),

Title: **George H. MacMaster: Innovator in RF Technology**

Introduction

George H. MacMaster, based in Lexington, MA, is a distinguished inventor known for his contributions to radio frequency (RF) technology. With an impressive portfolio of 20 patents, MacMaster has made significant advancements in the field, particularly in the design and application of amplifiers and combiners.

Latest Patents

Among his latest innovations, MacMaster has developed the **High RF Isolation Crossed-Field Amplifier**. This invention features a crossed-field amplifier tube designed to eliminate direct RF coupling between the output and input of the slow-wave structures, enabling efficient RF pulsed operation. This design thrives in scenarios where there is a mismatched load, ensuring optimal performance without breaking into oscillation. It allows for high peak and average power during RF pulses by operating into a closely matched load.

Another notable patent is the **Spatial Field Power Combiner Having Offset Coaxial to Planar**. This cylindrical multi-port combiner is engineered for high efficiency, boasting a graceful degradation characteristic with exceptional isolation (25 dB) between ports. Its design incorporates a balanced mode transmission line, making it highly effective in connecting multiple phase-matched RF sources while dampening unbalanced modes during failures, ensuring minimal impact on overall performance.

Career Highlights

MacMaster is affiliated with Raytheon Company, a leader in defense and aerospace systems. His work not only showcases technical innovation but also contributes to the enhancement of communication systems in various sectors, including military and commercial applications.

Collaborations

Throughout his career, MacMaster has collaborated with notable colleagues, including Lawrence J. Nichols and Kenneth W. Dudley. Together, they have pushed the boundaries of RF technology, combining their expertise to drive innovation within the company.

Conclusion

George H. MacMaster stands out as a prominent inventor in the RF technology space. His groundbreaking patents reflect his deep understanding of complex systems and his commitment to advancing technological capabilities. As his career progresses, MacMaster continues to inspire future generations of inventors and engineers in the domain of radio frequency applications.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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