Transmission-line resistance compression networks and related techniques
First Claim
1. A circuit comprising:
- first and second loads having substantially the same input impedances under substantially the same operating conditions; and
a transmission-line resistance compression network, including;
an input port;
a first output port coupled to the first load;
a second output port coupled to the second load; and
a transmission-line network coupled to the input port, the first output port, and the second output port, the transmission-line network comprising at least two transmission lines of different lengths;
wherein, for a first operating range, the resistances at input ports of the first and second loads vary over first and second ratios, respectively, the resistance of the input impedance at the input port of the transmission-line resistance compression network varies over a third ratio, and the third ratio is smaller than at least one of the first and second ratios.
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Accused Products
Abstract
Described embodiments provide a transmission-line resistance compression network that includes an input port, a first output port coupled to a first load and a second output port coupled to a second load. The first and second loads may have substantially similar input impedances under substantially similar operating conditions. The transmission-line resistance compression network includes a transmission-line network coupled to the input port, the first output port and the second output port, and includes at least two transmission lines of different lengths. For a first operating range, the resistances at input ports of the first and second loads vary over first and second ratios, respectively. The resistance of the input impedance at the input port of the transmission-line resistance compression network varies over a third ratio that is smaller than at least one of the first and second ratios.
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Citations
16 Claims
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1. A circuit comprising:
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first and second loads having substantially the same input impedances under substantially the same operating conditions; and a transmission-line resistance compression network, including; an input port; a first output port coupled to the first load; a second output port coupled to the second load; and a transmission-line network coupled to the input port, the first output port, and the second output port, the transmission-line network comprising at least two transmission lines of different lengths; wherein, for a first operating range, the resistances at input ports of the first and second loads vary over first and second ratios, respectively, the resistance of the input impedance at the input port of the transmission-line resistance compression network varies over a third ratio, and the third ratio is smaller than at least one of the first and second ratios. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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varying a resistance presented to an input port of a first load using a first transmission line segment having a first electrical length at a first frequency, the first load being associated with a first resistance range at the first frequency, the resistance at the input port of the first load varied over a first ratio; varying a resistance presented to an input port of a second load using a second transmission line segment having a second electrical length at the first frequency, the second load being associated with a second resistance range at the first frequency, the resistance at the input port of the second load varied over a second ratio; wherein the varying is performed by a transmission-line resistance compression network comprising an input port, a first output port coupled to the first load, a second output port coupled to the second load, and a transmission-line network coupled to the input port, the first output port, and the second output port, the transmission-line network comprising the first transmission line segment and the second transmission line segment, and providing a resistance range at the input port of the transmission-line resistance compression network that varies over a third ratio, wherein the third ratio is smaller than at least one of the first and second ratios. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification