Microwave applicator for frozen ground

Details Microwave applicator for frozen ground Microwave applicator for frozen ground

1984-06-14

1986-02-18

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055F, 219 1055R, 343767, 343770, H05B 672

Patent

active

045714738

ABSTRACT:
A microwave applicator for heating materials with microwaves. A coaxial transmission line is inserted in the material and coupled at one end to a source of microwaves. A shorting plate covers the other end of the cable and a plurality of radiating apertures are provided along the outer conductor. The use of a coaxial line avoids the minimum size requirements present with hollow waveguides. The coaxial line may be directly coupled to the output probe of a microwave generator by means of spring-finger contacts on the inner conductor of the coaxial line.

REFERENCES:
patent: 3230957 (1966-01-01), Seifert
patent: 3263052 (1966-07-01), Jeppson et al.
patent: 3829649 (1974-08-01), Igarashi
patent: 3980855 (1976-09-01), Boudouris et al.
patent: 3988036 (1976-10-01), Fisher et al.
patent: 4208562 (1980-06-01), Perreault
patent: 4217477 (1980-08-01), Matsubara et al.
patent: 4221948 (1980-09-01), Jean
patent: 4370534 (1983-01-01), Brandon
patent: 4370535 (1983-01-01), Noda
patent: 4399341 (1983-08-01), Yasuoka
"Review of Thawtron.TM. Device for Thawing Frozen Coal," Mar. 1982, prepared by SRI Intl., Menlo Park, CA; Principal Investigators W. A. Edson and G. E. Tallmadge.

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