Test apparatus with low-reflection signal distribution
AssigneeInfineon Technologies AG
InventorsRalf Arnold, Heinz Mattes, Klaus Standner
Life of this patent
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Abstract
A test apparatus includes a signal source that generates a radio-frequency test signal and is connected to the input connection of an arrangement. The arrangement simultaneously supplies an electrical radio-frequency signal to a plurality of receivers and via a plurality of distribution lines. Each distribution line includes an end with an output connection that applies the power-matched test signal to a respective external component.
Claims16
An arrangement for supplying an electrical radio-frequency signal to a plurality of receivers, the arrangement comprising:
- a supply line configured to connect to a signal source, wherein the signal sourcs has an internal impedance and the supply line has a supply line characteristic impedance;
- an input connection provided at one end of the supply line to facilitate the connection between the supply line and the signal source;
- a branch point provided at another end of the supply line;
- and
- a plurality of N distribution lines extending from the branch point, wherein each distribution line has a distribution line characteristic impedance, wherein N is at least 3 and the distribution line characteristic impedance is essentially equal to the product of N times the supply line characteristic impedance.
An arrangement for supplying an electrical radio-frequency signal to a plurality of receivers, the arrangement comprising:
- a supply line configured to connect to a signal source having an internal impedance, wherein the supply line has a supply line characteristic impedance;
- an input connection provided at one end of the supply line to facilitate the connection between the supply line and the signal source;
- a branch point provided at another end of the supply line;
- a plurality of N distribution lines extending from the branch point, wherein each distribution line has a distribution line characteristic impedance;
- a plurality of resistors, wherein each resistor is provided between the branch point and a corresponding distribution line, the resistance value of each resistor is essentially as large as the distribution line characteristic impedance of the corresponding distribution line, and the sum of the resistance values of the resistors and the distribution line characteristic impedances of the N distribution lines is essentially equal to the product of N times the supply line characteristic impedance.
Dependencies are inferred from the claim text.