US 4,306,205 AGranted

High frequency apparatus

AssigneeMurata Manufacturing Co., Ltd.

InventorsKatsuo Ito, Eiichi Hibino, Kiyoshi Kawakita

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Abstract

A high frequency apparatus such as an electronic television tuner comprises a main base plate having a circuit pattern and components disposed on it. A shield casing encloses and supports the main base plate by encompassing it at its peripheral edge. The shield casing is open at one side corresponding to one edge of the main base plate and is preferably also open at the upper and lower surfaces of the casing. The opened side of the shield casing is provided with an auxiliary base plate having a shield conductive film on its outer surface. The main base plate has a plurality of first apertures and the auxiliary base plate has corresponding pluralities of second and third apertures. Capacitor elements are inserted through at least some of the second apertures. The first apertures and apertures in the capacitor elements receive corresponding end portions of L shaped connection terminals. One end of each of the connection terminals is electrically connected to the circuit pattern, while the other end of each terminal is electrically connected to the hollow portion electrode of each of the cylindrical capacitor elements. Each of the connection terminals preferably has an integral protrusion received in the third aperture, for positioning the connection terminal. The open top and bottom surfaces of the shield casing are covered with shield covers.

Claims15

Dependent claims

A high frequency apparatus, comprising:

a main base plate having at least one edge and having a first main surface, and further having a circuit pattern on at least said first main surface and having circuit components electrically connected to said circuit pattern;
a shield casing receiving said main base plate, said shield casing being open at one side adjacent to said edge of said main base plate;
an auxiliary base plate secured to said shield casing across said open side of said shield casing, said auxiliary base plate having an outer main surface and having a conductive shield layer on substantially the whole of said outer main surface;
said main base plate having therein a first aperture, and said auxiliary base plate having therein a second aperture;
a capacitor element received in said second aperture and having an additional aperture therein;
and
a connection terminal having two arms oriented relative to each other at substantially a right angle, one arm being received in said first aperture and being electrically connected to said circuit pattern and mechanically secured to said main base plate, and the other arm being received in said additional aperture of said capacitor element and extending out through said auxiliary base plate and further being electrically connected to and mechanically secured to said capacitor element, whereby said other arm is secured in place through said aperture in said capacitor element and relative to said auxiliary base plate.

4 more elements

Dependencies are inferred from the claim text.