Back to results
US 7,772,941 B2Granted
Ultra-wideband/dualband broadside-coupled coplanar stripline balun
AssigneeHong Kong Applied Science and Technology Research Institute Company Limited
InventorsLap-Kun Yeung, Angus C. K. Mak, Corbett R. Rowell
Life of this patent
Estimating the term…
Abstract
A balun comprises at least two asymmetric coplanar striplines, a first of the striplines coupled to a signal input, and a second of the striplines coupled to a signal output, the at least two asymmetric coplanar striplines configured in a Marchand architecture to receive an unbalanced signal and to output a balanced signal.
Claims23
A balun comprising:
- a dielectric layer having a first side and a second side that is located opposite to the first side;
- a first conductor layer located on the first side;
- and
- a second conductor layer located on the second side;
- wherein the first conduction layer includes a first port portion, a second port portion and a ground portion;
- wherein the second conduction layer includes a third port portion and a ground portion;
- wherein a part of the first port portion overlaps a part of the third port portion to form a first resonating couple area, and a part of the second port portion overlaps with another part of the third port portion to form a second resonating couple area;
- wherein the first port portion and the second port portion form a balanced port, and the third port portion forms an unbalanced port;
- and
- wherein the balun is a Marchand balun.
7 more elements
A balun comprising:
- a dielectric layer having a first side and a second side that is located opposite to the first side;
- a first conductor layer located on the first side;
- and
- a second conductor layer located on the second side;
- wherein the dielectric layer, first conductor layer, and second conductor layer are formed on two sides of a single layer printed circuit board;
- wherein the first conduction layer includes a first port portion, a second port portion and a ground portion;
- wherein the second conduction layer includes a third port portion and a ground portion;
- wherein a part of the first port portion overlaps a part of the third port portion to form a first resonating couple area, and a part of the second port portion overlaps with another part of the third port portion to form a second resonating couple area;
- and
- wherein the first port portion and the second port portion form a balanced port, and the third port portion forms an unbalanced port.
7 more elements
A balun comprising:
- a dielectric layer having a first side and a second side that is located opposite to the first side;
- a first conductor layer located on the first side;
- and
- a second conductor layer located on the second side;
- wherein the first conduction layer includes a first port portion, a second port portion and a ground portion;
- wherein the ground portion of the first conducting area comprises a wedge shaped ground that is located proximate to the first port portion and the second port portion such that the distance between the wedge shaped portion and the each of the port portions varies along each port portion;
- wherein the second conduction layer includes a third port portion and a ground portion;
- wherein a part of the first port portion overlaps a part of the third port portion to form a first resonating couple area, and a part of the second port portion overlaps with another part of the third port portion to form a second resonating couple area;
- and
- wherein the first port portion and the second port portion form a balanced port, and the third port portion forms an unbalanced port.
7 more elements
A balun comprising:
- a dielectric layer having a first side and a second side that is located opposite to the first side;
- a first conductor layer located on the first side;
- and
- a second conductor layer located on the second side;
- wherein the first conduction layer includes a first port portion, a second port portion and a ground portion;
- wherein the second conduction layer includes a third port portion, a stub portion, and a ground portion, and the stub portion is connected to the third portion;
- wherein a part of the first port portion overlaps a part of the third port portion to form a first resonating couple area, and a part of the second port portion overlaps another part of the third port portion to form a second resonating couple area;
- and
- wherein the first port portion and the second port portion form a balanced port, and the third port portion forms an unbalanced port.
6 more elements
Dependencies are inferred from the claim text.