Transceiver arrangement and communication device

Patent metadata

Field	Value
Publication number	US-9900044-B2
Application number	US-201415113342-A
Country	US
Kind code	B2
Filing date	Jan 21, 2014
Priority date	Jan 21, 2014
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A transceiver arrangement is disclosed. The transceiver arrangement comprises a receiver arranged for frequency-division duplex communication with a communication network and a transmitter arranged for frequency-division duplex communication with the communication network. The transceiver arrangement also comprises a transmission port anda phase shifter arrangement which comprises a first 180° phase shifter and a second 180° phase shifter. The transceiver arrangement further comprises a filtering arrangement. The filtering arrangement comprises filters of a first type and filters of a second type. The filtering arrangement and the phase shifter arrangement are arranged to connect the receiver, transmitter and transmission port forming a first signal path between the transmission port and the transmitter by a first one of the filters of the first type and the first phase shifter in series, a second signal path between the transmission port and the transmitter by a second one of the filters of the first type and a first one of the filters of the second type in series, a third signal path between the transmission port and the receiver by a second one of the filters of the second type and the second phase shifter in series, and a fourth signal path between the transmission port and the receiver by a third one of the filters of the second type and a third one of the filters of the first type in series. The filters of the first type are arranged to pass signals at transmitter frequency and attenuate signals at receiver frequency, and the filters of the second type are arranged to attenuate signals at transmitter frequency and pass signals at receiver frequency. A communication device capable of frequency division duplex communication comprising such a transceiver arrangement is also disclosed.

First claim

The invention claimed is:

1. A transceiver arrangement comprising
a receiver arranged for frequency-division duplex communication with a communication network;
a transmitter arranged for frequency-division duplex communication with the communication network;
a transmission port;
a phase shifter arrangement which comprises a first 180° phase shifter and a second 180° phase shifter; and
a filtering arrangement, which comprises filters of a first type and filters of a second type,
wherein the filtering arrangement and the phase shifter arrangement are arranged to connect the receiver, transmitter and transmission port forming
a first signal path between the transmission port and the transmitter by a first one of the filters of the first type and the first phase shifter in series;
a second signal path between the transmission port and the transmitter by a second one of the filters of the first type and a first one of the filters of the second type in series;
a third signal path between the transmission port and the receiver by a second one of the filters of the second type and the second phase shifter in series;
a fourth signal path between the transmission port and the receiver by a third one of the filters of the second type and a third one of the filters of the first type in series,
and wherein
the filters of the first type are arranged to pass signals at transmitter frequency and attenuate signals at receiver frequency, and the filters of the second type are arranged to attenuate signals at transmitter frequency and pass signals at receiver frequency.

2. The transceiver arrangement according to claim 1 , wherein the filters of the first and second types are non-directional filters comprising linear components.

3. The transceiver arrangement of claim 1 , wherein the filters of the first type each comprises a capacitance and a first inductance coupled in parallel where the parallel coupling is coupled in series with a second inductance, and the filters of the second type each comprises a first capacitance and an inductance coupled in parallel, where the parallel coupling is coupled in series with a second capacitance.

4. The transceiver arrangement of claim 3 , wherein at least one of the capacitance and the first and second inductances of each of the filters of the first type are controllable and are arranged to be controlled by a controller, and at least one of the inductance and the first and second capacitances of each of the filters of the second type are controllable and are arranged to be controlled by the controller.

5. The transceiver arrangement of claim 1 , wherein the filters of the first type each comprises a first capacitance and an inductance coupled in parallel, where the parallel coupling is coupled in series with a second capacitance, and the filters of the second type each comprises a capacitance and a first inductance coupled in parallel where the parallel coupling is coupled in series with a second inductance.

6. The transceiver arrangement of claim 5 , wherein at least one of the inductance and the first and second capacitances of each of the filters of the first type are controllable and are arranged to be controlled by a controller, and at least one of the capacitance and the first and second inductances of each of the filters of the second type are controllable and are arranged to be controlled by the controller.

7. The transceiver arrangement of claim 1 , wherein at least one of the first and second phase shifters comprises a transformer arrangement.

8. The transceiver arrangement of claim 7 , wherein the transformer arrangement comprises a first winding connected between a first terminal of the transformer arrangement and a reference voltage and a second winding connected between a second terminal of the transformer arrangement and a reference voltage, wherein the first and second windings have mutually opposite magnetic polarity.

9. The transceiver arrangement of claim 7 , wherein the transformer arrangement comprises an autotransformer with a winding connected between a first terminal of the transformer arrangement and a second terminal of the transformer arrangement, with a tap of the winding connected to a reference voltage.

10. A communication device, capable of frequency division duplex communication via a communication network, comprising a transceiver arrangement according to claim 1 .

Assignees

• Ericsson Telefon Ab L M
• Ericsson Telefon Ab L M

Inventors

• Sjoland Henrik

Classifications

• H04L43/028

  by filtering · CPC title

• H04L27/201

  in which the allowed phase changes vary with time, e.g. multi-h modulation · CPC title

• H04B1/525 Primary

  with means for reducing leakage of transmitter signal into the receiver · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title