Temperature controlled phase compensation for tuned amplifiers
AssigneeSpace Exploration Technologies Corp.
InventorsAmir Agah, Eric Pepin
Life of this patent
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Abstract
A temperature controlled phase compensation circuit may include a varactor coupled between a radio frequency (RF) transmission line and a node. A temperature controlled phase compensation circuit may include a resistance coupled between a voltage supply and the node, the voltage supply configured to supply a supply voltage. A temperature controlled phase compensation circuit may include a temperature controlled current source coupled to the node and configured to produce a capacitor voltage between the varactor and the resistance, wherein a capacitor voltage produced at the node and applied to the varactor is inversely related to temperature.
Claims46
A temperature controlled phase compensation circuit, comprising:
- a varactor coupled between a radio frequency (RF) transmission line and a node;
- a resistance coupled between a voltage supply and the node, the voltage supply configured to supply a supply voltage;
- and
- a temperature controlled current source coupled to the node and configured to produce a capacitor voltage between the varactor and the resistance;
- wherein a capacitor voltage produced at the node and applied to the varactor is inversely related to temperature.
A phased array antenna system, comprising:
- a radio frequency (RF) transmission line having a first end and a second end;
- a first component electrically coupled to the RF transmission line at the first end or the second end, wherein the first component exhibits a capacitance reduction as a function of a reduction in a temperature at which the phased array antenna system operates;
- and
- a temperature controlled phase compensation circuit, comprising:
- a varactor coupled between the RF transmission line and a node;
- a resistance coupled between a voltage supply and the node, the voltage supply configured to supply a supply voltage;
- and
- a temperature controlled current source coupled to the node and configured to produce a capacitor voltage at the node in response to a change in the temperature;
- wherein the capacitor voltage produced at the node and applied to the varactor is CTAT, and wherein a capacitance compensation applied to the RF transmission line is CTAT and compensates for at least the capacitance reduction of the first component.
A temperature controlled phase compensation circuit, comprising:
- a varactor coupled between a radio frequency (RF) transmission line and a node;
- an inductor coupled between the RF transmission line and a voltage reference;
- and
- a temperature controlled voltage source coupled to the varactor at the node and configured to apply a capacitor voltage to the varactor that varies inversely with temperature.
An apparatus for providing temperature controlled phase compensation for a tuned amplifier, the apparatus comprising:
- an amplifier;
- an inductive load coupled to an output node of the amplifier;
- a varactor, wherein the varactor is alternating current (AC)-coupled to the output node of the amplifier;
- and
- a temperature controlled circuit for adjusting a direct current (DC) voltage across the varactor, wherein the temperature controlled circuit is configured to vary a capacitance of the varactor inversely to changes in temperature of the temperature controlled circuit.
A temperature controlled phase compensation circuit, comprising:
- a varactor coupled between an amplifier output node and a bias node;
- a resistance coupled between a voltage supply and the bias node, the voltage supply configured to supply a supply voltage;
- and
- a temperature controlled current source coupled to the bias node and configured to produce a capacitor voltage at the bias node, wherein the capacitor voltage produced at the bias node and applied to the varactor is inversely related to temperature.
Dependencies are inferred from the claim text.