Article comprising a combiner-splitter

• US 6,037,840 A
• Filed: 12/18/1997
• Issued: 03/14/2000
• Est. Priority Date: 12/18/1997
• Status: Expired due to Fees

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Myer, Robert E.
• Primary Examiner(s): Lee, Benny
• Assistant Examiner(s): NGUYEN, KHANH V
• Application Number:
  US08/994,031
• Time in Patent Office: 817 Days
• Field of Search: 330/295, 330/286, 330/124 R
• US Class Current: 330/295
• CPC Class Codes: H01P 5/12 Coupling devices having more than two ports H01P5/04 takes precedence

Abstract

A multicarrier linear RF power amplifier incorporating an improved signal splitter and an improved signal combiner is disclosed. The amplifier comprises a plurality of wedge-shaped amplifier modules. When such modules are radially disposed and abutted against one another, the inwardly facing edges of the modules collectively define a central or axially-located opening. An improved signal splitter, signal combiner, or dual splitter/combiner is advantageously disposed in the axially-located opening. The signal splitter or signal combiner is a conductor arrangement comprising a plurality of equal length conductors radially disposed on a dielectric substrate. The conductor arrangement is advantageously disposed within a suitably-configured housing. The housing is disposed within the axially-located opening.

Claims

1. An article for amplifying a first multicarrier RF signal, comprising:

a first plurality of radially-arranged conductors that are disposed on a first dielectric surface and suspended within a first housing, wherein said first plurality of radially-arranged conductors are operable to divide the first multicarrier RF signal into a plurality of equal-power multicarrier RF signals, wherein one multicarrier RF signal is carried along each radially-arranged conductor;

a plurality of amplifier modules, wherein each amplifier module is electrically connected to one of the radially-arranged conductors of the first plurality and is operable to amplify the one multicarrier RF signal carried along the one radially-arranged conductor electrically connected thereto; and

a second plurality of radially-arranged conductors that are disposed on a second dielectric surface and suspended within said first housing, wherein each radially-arranged conductor of the second plurality is electrically connected to one of the amplifier modules, and further wherein each radially-arranged conductor of the second plurality is operable to receive the one amplified multicarrier RF signal from the amplifier module electrically connected thereto, and, further, the second plurality of radially-arranged conductors is operable, collectively, to combine the amplified multicarrier RF signals into a second multicarrier RF signal.

2. The article of claim 1 wherein said housing comprises a lower plate, a middle plate and an upper plate, and the middle plate shields the first plurality of radially-arranged conductors from the second plurality of radially-arranged conductors.

3. The article of claim 1 wherein the first multicarrier RF signal is delivered to a central axis of the first plurality of radially-arranged conductors, wherein, at the central axis, all the radially-arranged conductors of the first plurality are in physical contact with one another.

4. The article of claim 3 wherein the amplified multicarrier RF signals are combined into the second multicarrier RF signal at a central axis of the second plurality of radially-arranged conductors wherein all the such conductors are in physical contact with one another.

5. The article of claim 3 wherein signal path length from the central axis of the first plurality of radially-arranged conductors to the central axis of the second plurality of radially-arranged conductors along any one of the radially-arranged conductors is equal to the signal path length along any other of the radially-arranged conductors.

6. The article of claim 1 wherein the length of each conductor is λ

/4, where λ

is the center frequency of the first multicarrier RF signal.

7. The article of claim 1 wherein each radially-arranged conductor of the first plurality is disposed within one cylindrically-shaped cavity of a first group of such cavities within the first housing.

8. The article of claim 1 wherein each radially-arranged conductor of the second plurality is disposed within one cylindrically-shaped cavity of a second group of such cavities within the first housing.

9. A base station for a wireless telecommunications system comprising:

a demultiplexer for demultiplexing a multiplexed RF signal into a first plurality of RF signals;

a plurality of radios, each of which radios is operable to receive one of the RF signals of the first plurality and modulate a message signal thereon;

a summing device for combining the modulated RF signals from the plurality of radios into a first multicarrier RF signal;

a multicarrier linear RF amplifier for amplifying the multicarrier RF signal, the amplifier comprising;

a first plurality of radially-arranged conductors that are disposed on a first dielectric surface and suspended within a first housing, wherein said first plurality of radially-arranged conductors are operable to divide the first multicarrier RF signal into a plurality of equal-power multicarrier RF signals, wherein one multicarrier RF signal is carried along each radially-arranged conductor;

a plurality of amplifier modules, wherein each amplifier module is electrically connected to one of the radially-arranged conductors of the first plurality and is operable to amplify the one multicarrier RF signal carried along the one radially-arranged conductor electrically connected thereto; and

a second plurality of radially-arranged conductors that are disposed on a second dielectric surface and suspended within said first housing, wherein each radially-arranged conductor of the second plurality is electrically connected to one of the amplifier modules, and further wherein each radially-arranged conductor of the second plurality is operable to receive the one amplified multicarrier RF signal from the amplifier module electrically connected thereto, and, further, the second plurality of radially-arranged conductors is operable, collectively, to combine the amplified multicarrier RF signals into a second multicarrier RF signal; and

an antenna for transmitting the second multicarrier RF signal.

10. An article for splitting a signal into a plurality of equi-power signals, comprising:

a first plurality of equal length, radially-arranged conductors, wherein said first plurality of conductors physically contact one another at a first central axis and further wherein said first plurality of conductors are disposed on a first dielectric substrate and suspended within a first plurality of cylindrical cavities, one conductor per cylindrical cavity;

a first input port disposed at the first central axis and operable to deliver a signal to the first plurality of radially-arranged conductors; and

a plurality of output ports, wherein each output port is operable to receive one equi-power signal carried on one of the radially-arranged conductors of the first plurality.

11. The article of claim 10, and further comprising:

a second plurality of equal length, radially-arranged conductors, wherein said second plurality of conductors physically contact one another at a second central axis and further wherein said second plurality of conductors are disposed on a second dielectric substrate and suspended within a second plurality of cylindrical cavities, one conductor per cylindrical cavity;

a plurality of input ports, wherein each input port of the plurality is operable to receive one signal of a plurality of such signals and deliver it to one of the radially-arranged conductors of the second plurality; and

an output port disposed at the second central axis and operable to receive a combined signal formed at the second central axis from the plurality of signals.

12. An article for combining a plurality of signals into a combined signal, comprising:

a plurality of equal length, radially-arranged conductors, wherein the conductors physically contact one another at a central axis and further wherein said plurality of conductors are disposed on a dielectric substrate and suspended within a plurality of cylindrical cavities, one conductor per cylindrical cavity;

a plurality of input ports, wherein each input port is operable to receive one signal of the plurality of such signals and deliver it to one of the radially-arranged conductors; and

an output port disposed at the central axis and operable to receive the combined signal formed at the central axis from the plurality of signals.