Multi-stage, high frequency, high power signal amplifier
First Claim
1. A broadband radio frequency (RF) signal amplifier, comprising:
- a plurality of transistors attached to a surface of a pedestal, each transistor having an input and an output, the pedestal comprising a support structure, reference ground and heat sink for the transistors;
a RF input path electrically connected to the transistor inputs, the input path including a splitter configured to split a RF input signal into a plurality of component input signals, a plurality of input matching networks configured to couple the respective component input signals to the transistor inputs at an input impedance, and a plurality of input direct current (dc) bias networks configured to bias the transistor inputs to an input operating point, the splitter, input matching networks and input bias networks at least partially implemented in a multi-layer printed circuit board; and
a RF output path electrically connected to the transistor outputs, the output path including a combiner configured to combine component output signals received at the transistor outputs into a RF output signal, a plurality of output matching networks configured to couple the respective component output signals to the transistor outputs at an output impedance, and a plurality of output dc bias networks configured to bias the transistor outputs to an output operating point, the combiner, output matching networks and output bias networks at least partially implemented in the printed circuit board.
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Accused Products
Abstract
A broadband RF signal amplifier includes a plurality of transistors attached to a surface of a pedestal, each transistor having an input and an output. An RF input path electrically connected to the transistor inputs includes a passive splitter implemented in a multi-layer printed circuit board and configured to split a RF input signal into a plurality of component input signals. A plurality of corresponding input matching networks including one-quarter wavelength transmission lines implemented in the printed circuit board couple respective component input signals to the transistor inputs at an input impedance, the input matching networks further comprising respective input matching capacitors attached to the pedestal. An RF output path electrically connected to the transistor outputs includes a passive combiner implemented in the printed circuit board and configured to combine component output signals received at the transistor outputs into a RF output signal. A plurality of corresponding output matching networks including one-quarter wavelength transmission lines implemented in the printed circuit board couple the respective component output signals at the transistor outputs to an output impedance.
13 Citations
28 Claims
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1. A broadband radio frequency (RF) signal amplifier, comprising:
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a plurality of transistors attached to a surface of a pedestal, each transistor having an input and an output, the pedestal comprising a support structure, reference ground and heat sink for the transistors;
a RF input path electrically connected to the transistor inputs, the input path including a splitter configured to split a RF input signal into a plurality of component input signals, a plurality of input matching networks configured to couple the respective component input signals to the transistor inputs at an input impedance, and a plurality of input direct current (dc) bias networks configured to bias the transistor inputs to an input operating point, the splitter, input matching networks and input bias networks at least partially implemented in a multi-layer printed circuit board; and
a RF output path electrically connected to the transistor outputs, the output path including a combiner configured to combine component output signals received at the transistor outputs into a RF output signal, a plurality of output matching networks configured to couple the respective component output signals to the transistor outputs at an output impedance, and a plurality of output dc bias networks configured to bias the transistor outputs to an output operating point, the combiner, output matching networks and output bias networks at least partially implemented in the printed circuit board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 16, 17)
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15. The amplifier of claim 15, wherein the first and second pluralities of conductors comprise respective sets of bond wires extending between the printed circuit board and the pedestal.
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18. A broadband radio frequency (RF) signal amplifier, comprising:
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a plurality of transistors attached to a surface of a pedestal, each transistor having an input and an output, the pedestal comprising a support structure, reference ground and heat sink for the transistors;
a RF input path electrically connected to the transistor inputs, the input path including a splitter configured to split a RF input signal into a plurality of component input signals, a plurality of input matching networks configured to couple the respective component input signals to the transistor inputs at an input impedance, and a plurality of input direct current (dc) bias networks configured to bias the transistor inputs to an input operating point, the splitter, input matching networks and input bias networks at least partially implemented in a multi-layer printed circuit board, the input matching networks comprising respective input matching capacitors attached to the pedestal; and
a RF output path electrically connected to the transistor outputs, the output path including a combiner configured to combine component output signals at the transistor outputs into a RF output signal, a plurality of output matching networks configured to couple the respective component output signals to the transistor outputs at an output impedance, and a plurality of output dc bias networks configured to bias the transistor outputs to an output operating point, the combiner, output matching networks and output bias networks at least partially implemented in the printed circuit board, the output matching networks comprising respective output matching capacitors attached to the pedestal. - View Dependent Claims (19, 20, 21, 22)
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23. A broadband radio frequency (RF) signal amplifier, comprising:
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a plurality of transistors attached to a surface of a pedestal, each transistor having an input and an output;
a RF input path electrically connected to the transistor inputs, the input path including a splitter configured to split a RF input signal into a plurality of component input signals, and a plurality of input matching networks configured to couple the respective component input signals to respective transistor inputs at an input impedance, the splitter and input matching networks at least partially implemented in a multi-layer printed circuit board, the input matching networks comprising respective input matching capacitors attached to the pedestal; and
a RF output path electrically connected to the transistor outputs, the output path including a combiner configured to combine component output signals at the transistor outputs into a RF output signal, and a plurality of output matching networks configured to couple the respective component output signals to the transistor outputs at an output impedance, the combiner and output matching networks at least partially implemented in the printed circuit board, the output matching networks comprising respective output matching capacitors attached to the pedestal. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification