Endgate LLC

Other

Endwave Corporation

Bert C Henderson

Clifford A Mohwinkel

Mark V Faulkner

Malkiat S Nijjar

Edward B Anderson

A slot line band reject pass filter including a substrate of insulating material having slot line primary conductors formed thereon. One or more supplemental conductors are preferably coupled to the slot line primary conductors to achieve rejection of a desired frequency. Several embodiments of supplemental conductors are disclosed including substantially closed loop and non loop segments that extend in a range from parallel to perpendicular from the primary conductors. The supplemental conductors may be directly or electromagnetically coupled, or both.

Slot line band reject filter

A coplanar band pass filter having a centerline formed of at least first and second serially arranged conducting segments which are separated by a gap. The centered segments are flanked by a resonator for coupling return current from the first and second segments. Conducting members that may include conductive strips or conductive planes are respectively provided on opposing sides of the resonator and centerline. Band pass elements may be provided in the conductive strips or planes to reduce or eliminate spurious pass band frequencies.

Coplanar waveguide filter

A slot line band pass filter formed on a dielectric substrate. In one embodiment, the filter includes input and output positive and negative signal conductors and resonators for coupling a signal of a desired frequency between input and output conductors. Various resonator arrangements are disclosed. In another embodiment, a filter having a resonator connected to and disposed between positive and negative conductors is taught. In yet other embodiments, filters having loop resonators are disclosed.

Slot line band pass filter

First and second slotlines are mounted on an electrically insulating substrate having a planar face with a connection region. Each slotline has first and second, spaced-apart coplanar conductors that extend into the connection region. A fifth, ground conductor, also mounted on the substrate face, is spaced from and coplanar with the first and second slotlines and has a proximal portion in the connection region. A chip circuit includes first and second field-effect transistors (FETs) flip mounted in the connection region to all five conductors. The gates of the FETs are connected to the first slotline for receiving an input signal. The drains are connected to the second slotline for outputting the signal amplified by the transistors. The sources of the FETs are connected to the fifth conductor. This general configuration can be modified for use as an amplifier, oscillator, frequency multiplier or mixer. The slotline may divide into parallel slotline portions for providing plural circuits in parallel with distributed impedance matching. A slotline may loop back from the connection region to provide a choice for impedance matching, and a portion of the fifth conductor may extend between slotline conductors to provide capacitive coupling.

Slotline-mounted flip chip structures

Mixers assemblies including mixer cells, baluns, quadrature mixers and image reject mixers, etc. The mixer cell may contain CPW strip RF input and slot line strip LO input. LO signal return is provided through a flip-chip mounted to a mixer contact area and the CPW RF input is preferably coupled to the contact area through a distributed or flip-chip mounted capacitor. The use of two mixer cells in novel embodiments of quadrature and image reject mixers is disclosed. CPW to slot line power dividing baluns for use within and without such mixers are also disclosed.

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Sunnyvale, CA, United States of America

Bert C Henderson