US 12,270,874 B2
Probehead insert for EPR apparatus
Mantas Simenas, London (GB); James Campbell O'Sullivan, London (GB); Christoph Wilhelm Zollitsch, London (GB); Oscar William Kennedy, London (GB); and John Julian Larrarte Morton, London (GB)
Assigned to UCL BUSINESS LTD, London (GB)
Appl. No. 18/041,625
Filed by UCL Business Ltd, London (GB)
PCT Filed Aug. 16, 2021, PCT No. PCT/GB2021/052116
§ 371(c)(1), (2) Date Feb. 14, 2023,
PCT Pub. No. WO2022/038340, PCT Pub. Date Feb. 24, 2022.
Claims priority of application No. 2012806 (GB), filed on Aug. 17, 2020.
Prior Publication US 2023/0305087 A1, Sep. 28, 2023
Int. Cl. G01R 33/345 (2006.01); G01R 33/36 (2006.01); G01R 33/60 (2006.01)
CPC G01R 33/345 (2013.01) [G01R 33/3614 (2013.01); G01R 33/60 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An insert for an EPR probehead, the insert comprising:
a directional coupler, wherein the directional coupler is configured to receive microwave power from a source at a first port and to transfer a portion of the received microwave power to a second port for transmission to a sample space, and wherein the directional coupler is configured to receive a first microwave signal from the sample space at the second port and to pass a majority of the received first microwave signal to a third port as a second microwave signal;
an amplifier having an input and an output, wherein the input is arranged to receive the second microwave signal from the third port of the directional coupler and to produce an amplified version of the received second microwave signal at the output for transmission to a detector; and
wherein the amplifier comprises a high electron mobility transistor.