Eagle Comtronics, Inc.

Gary J Clark

Joseph A Zennamo, Jr

Joseph N Maguire

Michael Lamb

The present invention provides a converter filter that includes a bandstop frequency range to protect against overloading of the input circuits of legacy converter boxes from the relatively high power upstream return path signal between 5 and 85 MHz. The converter filter also functions to pass the downstream signal path with minimal loss and reflection. The converter filter comprises a circuit including a low pass filter and high pass filter in parallel with each other that operate to substantially pass signals in a first frequency band of approximately 5 to 52 MHz and a second frequency band of approximately 85 MHz to 2 GHz while substantially blocking signals in a third frequency band of approximately 52 MHz to 85 MHz.

Legacy converter filter with extended frequency range

An electronic signal filter is provided, including a cylindrical housing and a single circuit board having a first filter section and a second filter section being positioned within the interior compartment of the cylindrical housing such that it effectively divides the interior compartment of the cylindrical housing into a first compartment and a second compartment. A first shield member is also provided, extending from the first surface of the circuit board, and a second shield member radially opposing the first shield member and extending from the second surface of the single circuit board is also provided. The second shield member is a discrete component from, and electrically connected to, the first shield member.

Isolation shield assembly for electrical filters and a method of manufacturing electrical filters including same

A technique is disclosed to independently tune different sections of a filter by momentarily frequency shifting a first tuned section, preferably by shorting certain nodes in the first tuned section, such that response of a second section can be determined and independently tuned. The first section is returned to normal operation after the second section is tuned.

Frequency shifting tuning process and filter structure

A tuned filter having an improved Q is disclosed in which two or more inductors are placed in parallel to increase the net Q relative to a single inductor of the same net inductance and/or two or more capacitors are placed in series to increase the net Q relative to a single capacitor of the same net capacitance to improve the Q of a tuned filter.

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Constantia, NY, United States of America

Gary J Clark