Harmonic filtering device for radio transmitter

Details Harmonic filtering device for radio transmitter Harmonic filtering device for radio transmitter

1979-12-21

1981-08-25

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333 22F, 333207, 333223, H01P 1202, H01P 1212, H01P 122

Patent

active

042862388

ABSTRACT:
A harmonic filtering device placed in a high frequency line connecting a radio transmitter to its load with at least one cell in parallel on the line, constituted by an anti-resonant circuit (at the transmission frequency of the transmitter) in series with a resistor, whose value is approximately 1/20th of the characteristic impedance of the line. This cell is made of a coaxial line with four conductors in which inset elements (short-circuit, capacitor, load) form the inductor and the capacitor of the anti-resonant circuit and the resistor. The resistor of this cell has no effect at the transmission frequency of the transmitter and creates insulation between the load and the transmitter for harmonic frequencies.

REFERENCES:
patent: 1644004 (1927-10-01), Zobel
patent: 2515061 (1950-07-01), Smith

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