CN103905074A

CN103905074A - Wireless communication device

Info

Publication number: CN103905074A
Application number: CN201210578115.XA
Authority: CN
Inventors: 王晓冬
Original assignee: Shenzhen Futaihong Precision Industry Co Ltd; Chi Mei Communication Systems Inc
Current assignee: Shenzhen Futaihong Precision Industry Co Ltd; Chi Mei Communication Systems Inc
Priority date: 2012-12-27
Filing date: 2012-12-27
Publication date: 2014-07-02

Abstract

The invention provides a wireless communication device, comprising an antenna, a first matching circuit, a second matching circuit, a first processing system and a second processing system. The antenna is used for receiving a first wireless signal and a second wireless signal which are different in operating frequency, the first matching circuit and the second matching circuit are electrically connected with the antenna and used for matching with impedance of the antenna, the first matching circuit is also used for enabling the first wireless signal to pass and isolating the second wireless signal, the second matching circuit is also used for enabling the second wireless signal to pass and isolating the first wireless signal, the first processing system is electrically connected with the first matching circuit and used for processing the first wireless signal, and the second processing system is electrically connected with the second matching circuit and used for processing the second wireless signal. The wireless communication device reduces a requirement of the antenna for inner space, thereby facilitating miniaturization of the wireless communication device.

Description

Radio communication device

Technical field

The present invention relates to a kind of radio communication device, particularly a kind of radio communication device that receives two-band signal.

Background technology

At present, a lot of radio communication devices (for example mobile phone) all have two-band signal receiving function, for example CDMA 450 signals (being commonly called as " well-informed greatly ") and frequency modulation (Frequency Modulation, FM) signal receiving function.For this reason, such radio communication device body all needs to be equipped with two antennas simultaneously, to receive respectively the signal of two frequency ranges.But, two antennas are set in radio communication device simultaneously, tend to, because antenna is unfavorable for the miniaturization of radio communication device to installing the requirement in space, make circuit structure more complicated simultaneously, increase design cost.

Summary of the invention

In view of this, be necessary to provide a kind of two-band signal and antenna less radio communication device that takes up room that receives.

A kind of radio communication device, it comprises antenna, the first match circuit, the second match circuit, the first treatment system and the second treatment system, this antenna is for receiving the first wireless signal and the second wireless signal that operating frequency is different, this first match circuit and the second match circuit are all electrically connected with antenna, for the impedance of mating antenna, the first match circuit is also for passing through the first wireless signal, and isolate the second wireless signal, the second match circuit is also for passing through the second wireless signal, and isolate the first wireless signal, the first treatment system and the first match circuit are electrically connected, for the treatment of the first wireless signal, the second treatment system and the second match circuit are electrically connected, for the treatment of the second wireless signal.

Above-mentioned radio communication device, by antenna is set, makes it receive the different wireless signal of two class centre frequencies simultaneously, utilizes the first match circuit and the second match circuit to realize the mutual isolation of two class wireless signals simultaneously.So, this radio communication device can utilize the different wireless signal of single antenna receiving-sending, can save inner space, is conducive to the miniaturization of radio communication device.

Accompanying drawing explanation

Fig. 1 is the functional block diagram of the radio communication device of preferred embodiments of the present invention.

Main element symbol description

Radio communication device	100
		Antenna	10
The first baseband chip	20
		The second baseband chip	30
The first radio frequency chip	40
		The second radio frequency chip	50
The first match circuit	60
		High-pass filtering circuit	62
The second match circuit	70
		Low-pass filter circuit	72
The first treatment system	80
		The second treatment system	90

Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.

Embodiment

Refer to Fig. 1, preferred embodiments of the present invention provides a kind of radio communication device 100, and it can be mobile phone, personal digital assistant (Personal Digital Assistant, PDA) etc.

This radio communication device 100 comprises antenna 10, the first baseband chip 20, the second baseband chip 30, the first radio frequency chip 40, the second radio frequency chip 50, the first match circuit 60 and the second match circuit 70.This first baseband chip 20 is electrically connected with antenna 10 by the first radio frequency chip 40 and the first match circuit 60 successively, and this second baseband chip 30 is electrically connected with antenna 10 by the second radio frequency chip 50 and the second match circuit 70 successively.This first baseband chip 20 and the first radio frequency chip 40 form the first treatment system 80, and this second baseband chip 30 and the second radio frequency chip 50 form the second treatment system 90.

In the present embodiment, this antenna 10 is one to be placed on the helical antenna of radio communication device 100.By regulating the physical structure of this antenna 10, while making the second wireless signal (FM) that the first wireless signal (CDMA450) that it is 450MHz in headend frequency and centre frequency are 100MHz, there is preferably effect.Because the frequency range of CDMA450 and FM is comparatively approaching, therefore this antenna 10 can also receive the second wireless signal receiving in the first wireless signal, thereby make user in the time using frequency modulation broadcast function without plugged earphone as FM antenna.

This first match circuit 60, for mating the impedance of antenna 10, is adjusted with the first wireless signal that antenna 10 is received, and then optimizes antenna performance.For example, improve voltage standing wave ratio (Voltage Standing Wave Ratio, VSWR) and the return loss (Return Loss) of the first wireless signal.This first match circuit 60 further comprises a high-pass filtering circuit 62 simultaneously, for the signal that frequency is higher is passed through, and the lower signal of isolation frequency.In the present embodiment, the first wireless signal (CDMA450) that centre frequency is 450MHz can pass through this high-pass filtering circuit 62, and the second wireless signal (FM) that centre frequency is 100MHz can not pass through this high-pass filtering circuit 62.

This second match circuit 70, for mating the impedance of antenna 10, is adjusted with the second wireless signal that antenna 10 is received, and then optimizes antenna performance.For example, improve voltage standing wave ratio (Voltage Standing Wave Ratio, VSWR) and the return loss (Return Loss) of the second wireless signal.This second match circuit 70 further comprises a low-pass filter circuit 72 simultaneously, for the signal that frequency is lower is passed through, and the higher signal of isolation frequency.In the present embodiment, the second wireless signal (FM) that centre frequency is 100MHz can pass through this low-pass filter circuit 72, and the first wireless signal (CDMA450) that centre frequency is 450MHz can not pass through this low-pass filter circuit 72.

This first radio frequency chip 40 and the first match circuit 60 are electrically connected, for modulating/demodulating the first wireless signal.This second radio frequency chip 50 and the second match circuit 70 are electrically connected, for demodulation the second wireless signal.

This first baseband chip 20 and the first radio frequency chip 40 are electrically connected, for decoding by the first wireless signal after the first radio frequency chip 40 demodulation, the signal (as voice signal) of simultaneously inputting for encoding user, and the signal after this coding is sent to the first radio frequency chip 40.This second baseband chip 30 and the second radio frequency chip 50 are electrically connected, for decoding by the second wireless signal after the second radio frequency chip 50 demodulation.

Further illustrate the operation principle of this radio communication device 100 below: in the time that antenna 10 is started working, this antenna 10 higher the first wireless signal (CDMA450) and lower the second wireless signal (FM) of frequency of receive frequency simultaneously.Because the second match circuit 70 is isolated the effect of high-frequency signal, make the first wireless signal can not pass through the second match circuit 70, and directly enter the first match circuit 60.In like manner, because the first match circuit 60 is isolated the effect of low frequency signal, make the second wireless signal can not pass through the first match circuit 60, and directly enter the second match circuit 70.So, this first wireless signal and the second wireless signal can phase mutual interference.

Thereafter, the first wireless signal is transferred into first baseband chip 20, the first baseband chip 20 these first wireless signals of decoding to obtain corresponding information after the demodulation of the first radio frequency chip 40.The second wireless signal is transferred into second baseband chip 30, the second baseband chip 30 these second wireless signals of decoding to obtain corresponding information after the demodulation of the second radio frequency chip 50 simultaneously.

In addition,, at transmitting terminal, due to the existence of the second match circuit 70, the transmitting of the first wireless signal also can not have influence on the reception of the first wireless signal.

Radio communication device 100 of the present invention, by antenna 10 is set, makes it receive the different wireless signal of two class centre frequencies simultaneously, utilizes the first match circuit 60 and the second match circuit 70 to realize the mutual isolation of two class wireless signals simultaneously.So, this radio communication device 100 can utilize single antenna 10 to receive and dispatch different wireless signals, can save inner space, is conducive to the miniaturization of radio communication device.

Claims

1. a radio communication device, it comprises antenna, it is characterized in that: this antenna is for receiving the first wireless signal and the second wireless signal that operating frequency is different, this radio communication device also comprises the first match circuit, the second match circuit, the first treatment system and the second treatment system, this first match circuit and the second match circuit are all electrically connected with antenna, for the impedance of mating antenna, the first match circuit is also for passing through the first wireless signal, and isolate the second wireless signal, the second match circuit is also for passing through the second wireless signal, and isolate the first wireless signal, the first treatment system and the first match circuit are electrically connected, for the treatment of the first wireless signal, the second treatment system and the second match circuit are electrically connected, for the treatment of the second wireless signal.

2. radio communication device as claimed in claim 1, it is characterized in that: described the first match circuit comprises a high-pass filtering circuit, the frequency of described the first wireless signal is higher than the frequency of the second wireless signal, described high-pass filtering circuit is used for making the first wireless signal to pass through, and isolation the second wireless signal.

3. radio communication device as claimed in claim 1, it is characterized in that: described the second match circuit comprises a low-pass filter circuit, the frequency of described the first wireless signal is higher than the frequency of the second wireless signal, described low-pass filter circuit is used for making the second wireless signal to pass through, and isolation the first wireless signal.

4. radio communication device as claimed in claim 1, is characterized in that: described the first treatment system comprises the first radio frequency chip, and described the first radio frequency chip and the first match circuit are electrically connected, for modulating/demodulating the first wireless signal.

5. radio communication device as claimed in claim 4, it is characterized in that: described the first treatment system also comprises the first baseband chip, described the first baseband chip and the first radio frequency chip are electrically connected, for decoding by the first wireless signal after the first radio frequency chip demodulation, the signal of simultaneously inputting for encoding user, and the signal after this coding is sent to the first radio frequency chip.

6. radio communication device as claimed in claim 1, is characterized in that: described the second treatment system comprises the second radio frequency chip, and described the second radio frequency chip and the second match circuit are electrically connected, for demodulation the second wireless signal.

7. radio communication device as claimed in claim 6, it is characterized in that: described the second treatment system also comprises the second baseband chip, described the second baseband chip and the second radio frequency chip are electrically connected, for decoding by the second wireless signal after the second radio frequency chip demodulation.

8. radio communication device as claimed in claim 1, is characterized in that: described antenna is placed on the helical antenna of radio communication device.

9. radio communication device as claimed in claim 1, is characterized in that: the CDMA450 signal that centered by described the first wireless signal, frequency is 450MHz, the FM signal that centered by described the second wireless signal, frequency is 100MHz.