Uniform electric field cavity design methods for single-mode liquid microwave resonant cavity

A uniform electric field cavity design method for a single-mode liquid microwave resonant cavity, wherein the uniform electric field cavity design method comprises:

• S1:
• determining a microwave frequency ƒ;
• S2:
• collecting dielectric constants of a liquid medium in an ƒ frequency band, wherein the ƒ frequency band is a frequency band range of the microwave frequency ƒ±20 MHz;
• during the collecting, raising a temperature of the liquid medium to 95±2° C. and allowing the temperature to naturally decrease over time;
• and recording a plurality of temperatures and the dielectric constants and dielectric losses at the plurality of temperatures;
• S3:
• determining a wavelength of a microwave of the ƒ frequency band in the liquid medium according to a wavelength formula;
• S4:
• determining a thickness of a microwave resonant cavity according to the wavelength of the microwave in the liquid medium in S3;
• S5:
• selecting a specification of a rectangular waveguide according to the microwave frequency ƒ and GB/T 11450.2-1989;
• S6:
• establishing a simple model including only the rectangular waveguide, a microwave window, and the microwave resonant cavity;
• S7:
• performing a parametric scan on phases of an upper microwave source and a lower microwave source of the simple model, and analyzing a microwave electric field distribution in the microwave resonant cavity;
• S8:
• performing a parametric scan on a length and a width of the microwave resonant cavity;
• and observing an electric field distribution and a reflection situation on an XY plane;
• S9:
• determining a waveguide wavelength λg at the microwave frequency ƒ based on formula (3), and adding a rectangular waveguide with height λg/2 to one side of the microwave resonant cavity, wherein a microwave in the microwave resonant cavity changes by half a phase cycle (2*π);
• λ
• gTE
• 1
• ⁢
• 0
• =
• λ
• 1
• -
• (
• λ
• 2
• ⁢
• a
• )
• 2
• (
• 3
• )
• S10:
• introducing a tapered waveguide based on the simple model;
• and
• S11:
• performing a parametric scan on a microwave window length, a microwave window width, and a tapered waveguide height to complete an electric field cavity design.