Air insulated high frequency filter with resonating rods
First Claim
1. An air insulated high frequency filter structure useful in a radio device, comprising:
- a plurality of resonating rods, an electrically conducting case at least partly encasing the rods, said rods and said case being arranged with respect to each other to define an air space therebetween, said rods being elongated finger-like tongues entirely coated with electrically conducting material and which extend from a printed circuit board within said case, said tongues each extending from respective bases and terminating at respective tips spaced from said printed circuit board, said case having a frame and at least one cover attached to said frame, said frame including a conductive wall, said tips being spaced from said conductive wall, said cover being made of an electrically conductive material, said tongues being spaced from said cover, whereby said tongues, said cover, and said wall form the filter structure.
1 Assignment
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Accused Products
Abstract
An inexpensive and lightweight air insulated high frequency filter can be made utilizing a radio device'"'"'s frame and a printed board (15) intended for electrical circuits, so that during manufacture of the printed board (15) it is machined so that several side by side finger-like projecting tongues (141, 142, 143, 144) are formed, which are entirely coated with electrically conducting material. Thereafter the printed board, on which electrical and mechanical components intended for it are mounted, is placed in the radio device'"'"'s crate-like frame made of conducting material and possibly provided with partition walls (18, 19), and on which also cover parts are fastened so that the tongues will be parallel with them and located between them, whereby the tongues, the enclosing cover parts and the frame wall parts form a filter structure.
59 Citations
11 Claims
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1. An air insulated high frequency filter structure useful in a radio device, comprising:
a plurality of resonating rods, an electrically conducting case at least partly encasing the rods, said rods and said case being arranged with respect to each other to define an air space therebetween, said rods being elongated finger-like tongues entirely coated with electrically conducting material and which extend from a printed circuit board within said case, said tongues each extending from respective bases and terminating at respective tips spaced from said printed circuit board, said case having a frame and at least one cover attached to said frame, said frame including a conductive wall, said tips being spaced from said conductive wall, said cover being made of an electrically conductive material, said tongues being spaced from said cover, whereby said tongues, said cover, and said wall form the filter structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
Specification