2334761-A is referenced by 3 patents and cites 2 patents.

The thruster comprises a tapered waveguide comprising a section 1, that is evacuated or filled with air, and a section 6 containing a dielectric resonator or ferrite material whose relative permeability or relative permittivity (or both) have values greater than unity. Microwaves may be introduced into the guide via a slot 2, or a probe. It is stated that the force 9, on the end wall 5, due to reflection of the microwaves, is less than the force 4, exerted on the end wall 3, thereby generating a resultant propulsive thrust. The thruster may be used to enable the orbit of a spacecraft to be maintained or changed over a period of time.

Microwave thruster for spacecraft
Application Number
GB19980009035 19980429
Publication Number
Application Date
April 29, 1998
Publication Date
September 1, 1999
Shawyer Roger John
Shawyer Roger John
H01P 07/00
F03H 05/00
F03H 99/00
F03H 99/00
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