Terminal eliminating harmonic components and intermodulation distortions component

Patent metadata

Field	Value
Publication number	US-2016285505-A1
Application number	US-201415032991-A
Country	US
Kind code	A1
Filing date	Nov 11, 2014
Priority date	Nov 13, 2013
Publication date	Sep 29, 2016
Grant date	—

Abstract

A terminal is disclosed by the present specification. The terminal may comprise: an antenna; a diplexer for compounding a carrier of a first band and a carrier of a second band and for connecting or disconnecting the same to the antenna; a filter connected to the diplexer; a first duplexer connected to the filter for separating transmissions and receptions in the carrier of the first band; and a second duplexer connected to the diplexer for separating transmissions and receptions in the carrier of the second band. To this end, the filter can eliminate harmonic components and intermodulation distortions (IMD) that occur when transmission in the carrier of the first band and transmission in the carrier of the second band are simultaneously performed.

First claim

What is claimed is:

1 . A terminal, comprising:
an antenna; a diplexer configured to combine a carrier for a first band and a carrier for a second band, to connect or to disconnect the same to the antenna; a filter connected between the antenna and the diplexer; a first duplexer connected to the filter, and configured to separate a transmission and a reception on the carrier of the first band; and a second duplexer connected to the filter, and configured to separate a transmission and a reception on the carrier of the second band, wherein the filter removes a harmonic component and an IMD component generated in case that a transmission on the carrier of the first band and a transmission on the carrier of the second band are simultaneously performed.

2 . The terminal of claim 1 , wherein the carrier of the first band is a low frequency band carrier based on LTE/LTE-A, and the carrier of the second band is a high frequency band carrier based on LTE/LTE-A.

3 . The terminal of claim 1 , wherein the carrier of the first band is band 5 based on LTE/LTE-A, and the carrier of the second band is band 1 based on LTE/LTE-A.

4 . The terminal of claim 1 , wherein the filter removes the harmonic component and the IMD component causing an interference in WLAN that uses an industrial scientific medical (ISM).

5 . The terminal of claim 1 , wherein an insertion loss caused by the filter is absorbed in a margin of reference sensitivity in case of a reception and is absorbed in a margin of maximum output power in case of a transmission, whereby a reduction of cell coverage is prevented.

6 . A terminal, comprising:
an antenna; a switch configured to selectively coupling a carrier with the antenna; one or more diplexers connected to the switch, and configured to separate a transmission and a reception on a carrier of middle band; and a diplexer connected to the switch, and configured to separate and synthesize a carrier of low frequency band and a carrier of high frequency band; a filter connected between the switch and the diplexer; a low frequency band duplexer connected to the diplexer, and configured to separate a transmission and a reception on the carrier of the low frequency band; and a high frequency band duplexer connected to the diplexer, and configured to separate a transmission and a reception on the carrier of the high frequency band, wherein the filter removes a harmonic component and an IMD component generated in case that a transmission on the carrier of the low frequency band and a transmission on the carrier of the high frequency band are simultaneously performed.

7 . The terminal of claim 6 , wherein the carrier of the low frequency band is band 5 based on LTE/LTE-A, and the carrier of the high frequency band is band 1 based on LTE/LTE-A.

8 . The terminal of claim 6 , wherein the filter removes the harmonic component and the IMD component causing an interference in WLAN that uses an industrial scientific medical (ISM).

9 . The terminal of claim 6 , wherein an insertion loss caused by the filter is absorbed in a margin of reference sensitivity in case of a reception and is absorbed in a margin of maximum output power in case of a transmission, whereby a reduction of cell coverage is prevented.

Assignees

• Lg Electronics Inc

Inventors

• Lee Sangwook
• Lim Suhwan
• Lee Dongik

Classifications

• 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

• H04B1/62

  for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio · CPC title

• H04B1/0057

  using diplexing or multiplexing filters for selecting the desired band · CPC title