On-chip tunable transmission lines, methods of manufacture and design structures
AssigneeInternational Business Machines Corporation
InventorsHanyi Ding, Guoan Wang, Wayne H. Woods, Jr.
Life of this patent
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Abstract
An on-chip tunable transmission line (t-line), methods of manufacture and design structures are provided. The structure includes a tunable transmission line (t-line) with fixed characteristic impedance comprising functionally-differentiated switches used for inductance and capacitance, respectively.
Claims18
A structure comprising a tunable transmission line (t-line) with fixed characteristic impedance comprising functionally-differentiated switches used for inductance and capacitance, respectively,
- wherein:
- the functionally-differentiated switches comprise:
- a first switch comprising at least a capacitor;
- and
- a second switch comprising at least a transistor;
- and
- the first switch and the second switch separately control inductance and capacitance to maintain a fixed impedance.
A structure comprising a tunable transmission line (t-line) with fixed characteristic impedance comprising functionally-differentiated switches used for inductance and capacitance, respectively,
- wherein:
- the functionally-differentiated switches comprise:
- a first switch comprising at least a capacitor;
- and
- a second switch comprising at least a transistor;
- and
- the functionally-differentiated switches act like a variable capacitance when a transistor F1 and the transistor F2 of the functionally-differentiated switches are turned on and off.
A structure comprising a tunable transmission line (t-line) with fixed characteristic impedance comprising functionally-differentiated switches used for inductance and capacitance, respectively,
- wherein:
- the functionally-differentiated switches include segments, each comprising transistors connected to inductance lines and a signal line;
- a distance between inductance lines of each segment is ½ a length of a previous segment;
- respective field effect transistors (FETs) that control the inductance lines are twice as large as the previous segment;
- and
- respective FETs connected to the signal line or capacitance cross lines are half as large as the previous segment.
A method of manufacturing a transmission line structure, comprising forming a tunable transmission line (t-line) upon a substrate with fixed characteristic impedance comprising functionally-differentiated switches used for inductance and capacitance,
- wherein the forming the functionally-differentiated switches comprises:
- forming a first switch connected to a signal line comprising a transistor and at least one capacitor connected in series;
- and
- forming a second switch connected to inductance lines comprising at least two transistors connected in series.
A method of manufacturing a transmission line structure, comprising forming a tunable transmission line (t-line) upon a substrate with fixed characteristic impedance comprising functionally-differentiated switches used for inductance and capacitance, wherein the forming the functionally-differentiated switches comprise:
- forming a first switch connected to a signal line comprising two capacitors connected in series and a transistor connected in parallel to the capacitor;
- and
- forming a second switch connected to an inductance line comprising transistors and a resistor connected in series.
A method in a computer-aided design system for generating a functional design model of a tunable transmission line (t-line), said method comprising:
- generating, by at least one computing device, a functional design model of the tunable transmission line with fixed characteristic impedance further comprising functionally-differentiated switches used for inductance and capacitance, respectively,
- wherein:
- the functionally-differentiated switches comprise:
- a first switch comprising at least a capacitor;
- and
- a second switch comprising at least a transistor;
- and
- the first switch and the second switch separately control inductance and capacitance to maintain a fixed impedance.
Dependencies are inferred from the claim text.