Multi-layer LC resonance balun
AssigneeIndustrial Technology Research Institute
InventorChing-Wen Tang
Life of this patent
Estimating the term…
Abstract
A multi-layer LC resonance balun includes at least a section of broadside coupled lines connected to an input port and two balanced output ports through transmission lines. Each section of coupled lines has two coupled lines. The first embodiment has at least two sections of coupled lines connected to a transmission line and coupled in parallel with at least one capacitor. The coupled lines are connected to an input port and two balanced output ports. The second embodiment has at least a section of coupled lines coupled in parallel with capacitors and then connected to an input port and two balanced output ports through transmission lines. By means of a multiple layer dielectric structure and meandered coupled lines, the size of the blaun is decreased and the frequency bandwidth is increased.
Claims21
An LC resonance balun comprising:
- a transmission line having first and second ends;
- a capacitor having first and second ends;
- a first group of at least one section of coupled lines, each section having first and second coupled lines, the first coupled line of each section being connected in series between said first end of said transmission line and said first end of said capacitor, the second coupled line of each section being connected in series between a first output port and ground;
- a second group of at least one section of coupled lines, each section having first and second coupled lines, the first coupled line of each section being connected in series between said second end of said transmission line and said second end of said capacitor, the second coupled line of each section being connected in series between a second output port and ground;
- and
- an input port connected to said second end of said capacitor.
An LC resonance balun comprising:
- a first capacitor having first and second ends;
- a first transmission line having a first end connected to a first output port and a second end connected to said first end of said first capacitor;
- a second transmission line having a first end connected to a second output port and a second end connected to said second end of said first capacitor;
- a second capacitor having first and second ends;
- a third transmission line having a first end connected to an input port and a second end connected to said first end of said second capacitor;
- a fourth transmission line having a first end connected to ground and a second end connected to said second end of said second capacitor;
- and
- at least one section of coupled lines, each section having first and second coupled lines, the first coupled line of each section being connected in series between said second end of said first transmission line and said second end of said second transmission line, the second coupled line of each section being connected in series between said second end of said third transmission line and said second end of said fourth transmission line.
Dependencies are inferred from the claim text.