Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1979-03-19
1981-02-03
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333209, 333227, 333230, H01P 1207
Patent
active
042491487
ABSTRACT:
A cubical device includes six square sides connected to form a cube. Each side has an electrically conductive inner surface electrically connected to the other inner surfaces. A plurality of electric field probes attached to coaxial connectors centrally mounted on respectively perpendicular sides of the cube extend into the volume bounded by the cube. In one embodiment of the invention, three opposing pairs of electric field probes extend into the volume from opposite sides of the cube. The electrical cube then functions as three independent bandpass filters, each having a "Q" determined by the volume. In another embodiment of the invention, an output probe extends into the cavity at a predetermined angle and senses the standing wave patterns produced in response to the electric field probes, whereby the cubical apparatus functions as a bidirectional combiner for up to three channels. In a further embodiment of the invention, one or more grounded conductive loops extend into the volume to produce interference between standing wave patterns therein, effecting internal coupling which causes the cubical device to function as one of a variety of composite filters, such as a double tuned filter or a composite bandpass filter with one or more notches in its output characteristic.
REFERENCES:
patent: 2357314 (1944-09-01), Carter
Decibel Products, Inc.
LaRoche Eugene R.
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