Abstract:
The present technique presents a fluid-cooled balun transformer including a substrate plate with a first and an opposite second face, a first and a second conductive element arranged on the first and the second face respectively, a first and a second signal port electrically connected to the first and the second conductive element respectively, and a cooling module. The second conductive element is transformingly coupled to the first conductive element and electrically isolated therefrom. The cooling module includes a first tubular member. The first tubular member has a fluid inlet to receive a coolant fluid into the first tubular member, a flow channel to conduct a flow of coolant fluid within the first tubular member and a fluid outlet to release the coolant fluid from the first tubular member. The flow channel of the first tubular member is arranged in thermal contact with the first conductive element.
Abstract:
The present disclosure is directed to a balun circuit (100, 200, 300) adapted to operate at a frequency of between about 5 GHz to about 110 GHz. The balun circuit includes first (120, 220, 320) and second (130, 230, 330) output striplines and an input stripline (110, 210, 310) formed on a first surface of the substrate (101, 201, 301), and a slotline (140, 240, 340) formed on a second surface of the substrate opposite the first surface. The slotline has first (144, 244, 344) and second (146, 246, 346) ends, the first end overlapping the first output stripline and the second end overlapping the second output stripline, and the input stripline overlapping the slotline midway between the first end and the second end.
Abstract:
Provided are assemblies and processes for efficiently coupling wideband differential signals between balanced and unbalanced circuits. The assemblies include a broadband balun having an unbalanced transmission line portion, a balanced transmission line portion, and a transition region disposed between the unbalanced and balanced transmission line portions. The unbalanced transmission line portion includes at least one ground and a pair of conductive signal traces, each isolated from ground. The balanced portion does not include an analog ground. The transition region effectively terminates the analog ground, while also smoothly transitioning or otherwise shaping transverse electric field distributions between the balanced and unbalanced portions. Beneficially, the balun is free from resonant features that would otherwise limit operating bandwidth, allowing it to operate over a wide bandwidth of 10:1 or greater. Assemblies can include RF chokes with back-to-back baluns, and other elements, such as balanced filters, and also can be implemented as integrated circuits.