Distributed amplifier

Patent metadata

Field	Value
Publication number	US-11595012-B2
Application number	US-202017035123-A
Country	US
Kind code	B2
Filing date	Sep 28, 2020
Priority date	May 9, 2018
Publication date	Feb 28, 2023
Grant date	Feb 28, 2023

Abstract

CRLH lines including left-handed shunt inductors and left-handed series capacitors are provided on gate side transmission lines of a plurality of FETs.

First claim

What is claimed is:

1. A distributed amplifier comprising:
a plurality of drain side transmission lines connected in series to each other;
a plurality of gate side transmission lines connected in series to each other;
a plurality of transistors connected in parallel to each other between the drain side transmission lines and the gate side transmission lines, each of the transistors having a gate terminal defined as a control terminal, a drain terminal, and a source terminal defined as a common terminal; and
a plurality of unit cells respectively including the gate side transmission lines,
wherein each of the unit cells further includes:
an inductor shunt-connected with respect to the corresponding gate side transmission line;
a first capacitor via which the gate terminal of the corresponding transistor is connected to the corresponding gate side transmission line; and
a DC cut capacitor connected in series to the shunt-connected inductor and connected to the gate terminal of the corresponding transistor via the shunt-connected inductor,
wherein connecting portions each between the shunt-connected inductor and the DC cut capacitor are connected together directly or via a resistor.

Assignees

• Mitsubishi Electric Corp

Inventors

• Kamioka Jun
• Hangai Masatake
• Yamanaka Koji

Classifications

• H03F2200/225

  the input circuit of an amplifying stage comprising an LC-network · CPC title

• H03F2200/543

  A transmission line being used as coupling element between two amplifying stages · CPC title

• H03F1/565

  using inductive elements · CPC title

• H03F1/18

  by use of distributed coupling {, i.e. distributed amplifiers (distributed amplifiers using coupling networks with distributed constants H03F3/605)} · CPC title

• H03F1/42

  Modifications of amplifiers to extend the bandwidth · CPC title