KR20130079704A - All in one cdma and blue tooth, wifi antenna system for detecting effectiveness thereof - Google Patents

All in one cdma and blue tooth, wifi antenna system for detecting effectiveness thereof Download PDF

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Publication number
KR20130079704A
KR20130079704A KR1020120000343A KR20120000343A KR20130079704A KR 20130079704 A KR20130079704 A KR 20130079704A KR 1020120000343 A KR1020120000343 A KR 1020120000343A KR 20120000343 A KR20120000343 A KR 20120000343A KR 20130079704 A KR20130079704 A KR 20130079704A
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KR
South Korea
Prior art keywords
antenna
high frequency
bluetooth
validity
transmission path
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Application number
KR1020120000343A
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Korean (ko)
Inventor
문근수
Original Assignee
현대모비스 주식회사
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Priority to KR1020120000343A priority Critical patent/KR20130079704A/en
Publication of KR20130079704A publication Critical patent/KR20130079704A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transceivers (AREA)

Abstract

In the present invention, a CDM integrated Bluetooth / Wi-Fi antenna system for detecting antenna validity may include a first antenna for transmitting and receiving a high frequency signal using a broadband mobile communication network and a first frequency for transmitting a signal of a predetermined frequency band to the first antenna. A first antenna unit including a transmission path; A second transmission path including a Bluetooth (BT) antenna and a Wi-Fi (WIFI) antenna for transmitting and receiving a high frequency signal, and a second transmission path for transmitting a signal of a predetermined frequency band to the Bluetooth (BT) antenna and the Wi-Fi (WIFI) antenna; 2 antenna parts; And filtering a high frequency component corresponding to a third harmonic component among the high frequency components induced by AC coupling with the first transmission channel to the second transmission path, and then transmitting There is a technical feature of providing an antenna validity determining unit for determining a matching state and a fastening state of the Bluetooth (BT) antenna and the Wi-Fi antenna by comparing the induced high frequency component value with a preset threshold value. .

Description

All-in-one CDMA AND BLUE TOOTH, WIFI ANTENNA SYSTEM FOR DETECTING EFFECTIVENESS THEREOF

The present invention relates to a CDM integrated Bluetooth / Wi-Fi antenna system for antenna validity detection, and more particularly, to a third harmonic induced by AC coupling to a CDM transmission path. CD-Integrated Bluetooth for detecting antenna validity that can detect the matching state of the Bluetooth (BT) antenna and the WIFI antenna and the open or short connection state using the component Relates to a Wi-Fi antenna system.

In general, a mobile communication terminal of a vehicle is provided with an antenna to transmit and receive a signal of a predetermined frequency. In order for the antenna to have an optimal transmit / receive radioactivity, the impedance must be accurately matched.

Therefore, recently, there is a demand for a detection system capable of accurately detecting a matching state and a fastening state of an antenna applied to a vehicle.

Figure 1 shows a typical Bluetooth / Wi-Fi antenna system is not provided with a determination unit for detecting the validity of the antenna in the prior art.

Referring to FIG. 1, a conventional Bluetooth / Wi-Fi antenna system 100 includes a combo module 121, a matching unit 122, a duplexer 123, a BT antenna 125a, and a WIFI antenna 125b. It is composed of a unit 120 and a control unit 140.

The combo module 121 has a form in which a Bluetooth (BT) module and a Wi-Fi (WIFI) module are combined, and modulates a BT (Blue Tooth) signal and a WIFI (Wireless Fidelity) signal respectively received from the controller 140. And power amplification.

The duplexer 123 separates the BT signal and the WIFI signal received from the combo module 121 into the BT antenna 125a and the WIFI antenna 125b, respectively.

The BT antenna 125a and the WIFI antenna 125b receive a radio frequency (RF) signal and are passive antennas composed of passive elements.

The matching unit 122 is connected to the antenna antenna (not shown) separately installed for impedance matching with the BT antenna 125a and the WIFI antenna 125b through an RF connector (not shown).

However, the related art has the following problems due to the connection structure of the matching unit and the use of a passive antenna.

First, the conventional technology has a problem in that the fastening is easily opened due to weak vibration and durability due to the structure of the RF connector.

Second, the prior art has a problem that the high frequency (RF) performance is sensitively changed according to the mounting structure of the antenna cable.

Third, the prior art does not have a separate detection system that can detect the fastening of the antenna or poor radiation pattern, there is a problem that the entire system must be replaced when problems such as disconnection with the phone.

Fourth, the prior art can not use a method such as an active antenna that detects the presence of the antenna by detecting the current flowing through the antenna due to the use of a passive antenna, so that the validity of the antenna can be verified in advance. There was a problem that was difficult to do.

The technical problem to be solved by the present invention is a Bluetooth (BT) antenna and a Wi-Fi (WIFI) antenna by using a third harmonic component induced by AC coupling to a CDMA transmission line. The present invention provides a CDM integrated Bluetooth Wi-Fi antenna system for detecting antenna validity capable of detecting a matching state and an open state or a short state of a fastening state.

In accordance with an aspect of the present invention, there is provided a CDM integrated Bluetooth / Wi-Fi antenna system for detecting antenna effectiveness according to an embodiment of the present invention, wherein a first antenna and a first antenna transmit and receive a high frequency signal using a broadband mobile communication network. A first antenna unit including a first transmission path for transmitting a signal; A second transmission path including a Bluetooth (BT) antenna and a Wi-Fi (WIFI) antenna for transmitting and receiving a high frequency signal, and a second transmission path for transmitting a signal of a predetermined frequency band to the Bluetooth (BT) antenna and the Wi-Fi (WIFI) antenna; 2 antenna parts; And filtering a high frequency component corresponding to a third harmonic component among the high frequency components induced by AC coupling with the first transmission channel to the second transmission path, and then transmitting An antenna validity determination unit is provided to determine a matching state and a fastening state of the Bluetooth (BT) antenna and the Wi-Fi antenna by comparing the induced high frequency component value with a preset threshold value.

The present invention has a technical effect of simply detecting a matching state and an open or short fastening state for passive antennas and correcting an error.

1 illustrates a general Bluetooth / Wi-Fi antenna system in which a determination unit for detecting the validity of an antenna is not provided in the prior art.
2 illustrates a Bluetooth / Wi-Fi antenna system having an antenna validity determining unit according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

2 illustrates a Bluetooth / Wi-Fi antenna system having an antenna validity determining unit according to the present invention.

Referring to FIG. 2, the Bluetooth / Wi-Fi antenna 200 including the antenna validity determining unit according to the present invention includes a first antenna unit 210, a second antenna unit 220, an antenna validity determination unit 230, and a controller ( 240).

The first antenna unit 210 includes a CDMA module 211, a switch unit 213, and a CDMA antenna 215.

The CDMA module 211 modulates a Code Division Multiple Access (CDMA) signal received from the controller 240, amplifies the power, and transmits the same through a first transmission path.

Here, the first transmission path is a transmission microstrip line connecting the CDMA module 211 and the CDMA antenna 215, and is responsible for the transmission of 800 MHz or 1.8 Ghz, which is a frequency band of the code division multiple access (CDMA). .

The switch unit 213 connects the CDMA antenna 215 on or off by a switching operation.

On the other hand, the switch unit 213 short-circuits the CDMA antenna 215 when the antenna validity detection unit 230 operates, and the high frequency (RF) component of the first transmission path flows into the CDMA antenna 215. It is desirable to prevent that.

 The CDMA antenna 215 receives a radio frequency (RF) signal through a code division multiple access (CDMA) mobile communication network, and a passive antenna composed of passive elements is used.

Meanwhile, the present invention has been described with reference to a CDMA antenna implemented through a mobile communication network of a code division multiple access (CDMA) scheme, but is not limited thereto. All broadband mobile communication networks, such as Long Term Evolution (LTE), W It is natural to use Wideband Code Division Multiple Access (CDMA), Wireless Broadband Internet (WiBro), World Interoperability for Microwave Access (WiMAX), High Speed Packet Access (HSPA), Wi-Fi, Bluetooth (BT), etc. .

The second antenna unit 220 includes a combo module 221, a duplexer 223, a BT antenna 225a, and a WIFI antenna 225b.

The combo module 221 has a form in which a Bluetooth (Blue Tooth, BT) module and a Wi-Fi (Wireless Fidelity, WIFI) module are combined, and a BT (Blue Tooth) signal and a WIFI (Wireless Fidelity) signal received from the control unit 240. Are respectively modulated, power amplified and transmitted through a second transmission path.

Here, the second transmission path is a transmission micro strip line connecting the combo module 221, the BT antenna 225a, and the WIFI antenna 225b, which is a frequency band of Bluetooth (BT) and Wi-Fi (WIFI). It is responsible for the transmission of Ghz.

The duplexer 223 separates the BT signal and the WIFI signal received through the second transmission path into the BT antenna 225a and the WIFI antenna 225b, respectively.

The BT antenna 225a and the WIFI antenna 225b receive a radio frequency (RF) signal and are passive antennas composed of passive elements.

The antenna validity determiner 230 may include a first coupler 231, a first BPF 232, a second BPF 233, a signal divider 234, a second coupler 235, an integrator 237, and a comparison determiner. And 238.

The first coupler 231 is in alternating current coupling with the first transmission line, which in this case corresponds to the level of the magnetic field component induced in the transmission microstrip line due to electromagnetic induction. Displacement charge current is introduced.

At this time, the displacement current flowing into the first coupler 231 corresponding to the 800Mhz / 1.8Ghz band is referred to as 'first displacement current Id1', and 2.4 corresponding to the third harmonic component of the first transmission path. The displacement current flowing into the first coupler 231 corresponding to the Ghz band is referred to as a 'second displacement current Id2'.

After the first BPF 232 receives the first displacement current Id1 and the second displacement current Id2, the first BPF 232 passes only the first high frequency component RF1 of the 800Mhz / 1.8Ghz band and blocks the frequency components of the remaining bands. Performs filtering.

The second BPF 233 receives the first displacement current Id1 and the second displacement current Id2 and passes only the second high frequency component RF2 of the 2.4 Ghz band, and blocks the frequency components of the remaining bands. Do this.

The signal splitter 234 separates the second high frequency component RF2 filtered by the second BPF 233 and separates the integrator 237 and the second transmission path signal, respectively. In this case, the signal splitter 234 is conventional. It can be implemented using a duplexer.

The second coupler 235 is AC-coupled with the second transmission line in the same manner as the first coupler 231, and in this case, electromagnetic induction is applied to the level of the magnetic field component induced in the transmission microstrip line. The corresponding third high frequency component RF3 is output to the integrator 237.

In this case, the third RF component RF3 induced by the second coupler 235 may be set according to whether the BT antenna 225a and the WIFI antenna are in a matching state, an open state, or a short state. This fluctuates.

The integrator 237 inputs the first RF component RF1, the second RF component RF2, and the third RF component RF3 induced through the second coupler 235 through the first coupler 231. The components are integrated and converted into direct current (DC) components.

In this case, the integrator 237 may include a first integrator (not shown), a second integrator (not shown), and a third integrator (not shown) for integrating with respect to each of the first high frequency component RF1 to the third high frequency component RF3. ) Can be configured to include

The comparison determining unit 238 compares the first high frequency component RF1 to the third high frequency component RF3 input to the comparator (not shown) with a preset threshold value Vth, respectively. To determine the validity of 225b), the comparison unit 238 may include a conventional three-stage comparator (not shown).

Table 1 shows the results of validity determination according to the harmonic component frequency, transmitter level, DC component value implemented in the present invention.

Figure pat00001

Hereinafter, referring to FIG. 2 and [Table 1], the comparison determining unit 238 determines whether a matching state, an open state, or a short state of the BT antenna 225a and the WIFI antenna are fastened. Briefly explain how.

First, it will be described on the assumption that the threshold Vth for determining the matching state is set to 80 mV and the threshold Vth for determining the fastening state is set to 6 mV.

In this case, when the value of the third high frequency component RF3 input to the comparator (not shown) of the comparison determination unit 238 is 100 mV to 120 mV, a value larger than 80 mV, which is a threshold value Vth for determining a matching state. It is determined to be 'matching' because

On the other hand, when the value of the third high frequency component RF3 input to the comparator (not shown) of the comparison determination unit 238 is 50mV to 70mV, it has a value smaller than 80mV, which is a threshold value Vth for determining a matching state. Therefore, it is determined as 'unmatching'.

In the same manner, when the value of the third high frequency component RF3 input to the comparator (not shown) of the comparison determination unit 238 is 5 mV or less, it is smaller than 6 mV, which is a threshold value Vth for determining the fastening state, and is opened. ) Or shorted 'fastening state'.

As a result, the present invention can easily detect a matching state of the passive antennas and a fastening state of an open or short circuit and correct an error.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention.

210: first antenna unit
211: CDMA module 213: switch unit 215: CDMA antenna
220: second antenna unit
221: combo module 223: duplexer
225a: BT antenna 225b: WIFI antenna
230: antenna validity determination unit
231: first coupler
232: first BPF 233: second BPF
234: signal splitter 235: second coupler
237: integrator
238: comparison judgment
240: control unit
Id1, Id2: first and second displacement currents
RF1, RF2, RF3: first, second, third high frequency components

Claims (6)

A first antenna unit including a first antenna for transmitting and receiving a high frequency signal using a broadband mobile communication network and a first transmission path for transmitting a signal of a predetermined frequency band to the first antenna;
A second transmission path including a Bluetooth (BT) antenna and a Wi-Fi (WIFI) antenna for transmitting and receiving a high frequency signal, and a second transmission path for transmitting a signal of a predetermined frequency band to the Bluetooth (BT) antenna and the Wi-Fi (WIFI) antenna; 2 antenna parts; And
After filtering the high frequency component corresponding to the third harmonic component among the high frequency components induced by AC coupling with the first transmission line and filtering the high frequency component to the second transmission line, induction in the second transmission line And an antenna validity determining unit configured to compare a matching high frequency component value with a preset threshold value and determine a matching state and a fastening state of the Bluetooth antenna and the Wi-Fi antenna. CDM integrated Bluetooth / Wi-Fi antenna system for validity detection. The method according to claim 1,
The first antenna, the Bluetooth (BT) antenna and the Wi-Fi (WIFI) antenna is a passive antenna, characterized in that the integrated CD / WiFi antenna system for antenna validity detection. The method of claim 1, wherein the antenna validity determination unit,
A first coupler for inducing high frequency components by AC coupling with the first transmission path;
A first BPF for filtering high frequency components in the 800Mhz or 1.8Ghz bands;
A second BPF for filtering high frequency components of the 2.4 Ghz band corresponding to the third harmonic component;
A signal distributor for transmitting the high frequency components filtered by the second BPF to the integrator and the second transmission path, respectively;
A second coupler for inducing high frequency components by coupling an AC with the second transmission path;
An integrator for receiving and integrating respective high frequency components output from the first BPF, the signal splitter, and the second coupler and converting the respective high frequency components into DC components; And
CD-May integrated Bluetooth / Wi-Fi antenna system for detecting antenna validity, characterized in that it comprises a comparator for determining the validity of the antenna by comparing each DC component value converted in the integrator and a predetermined threshold value . The method of claim 3, wherein the comparator,
Integrating a high frequency component derived from each of the second couplers by comparing a DC component value and a predetermined threshold value, a matching state of the Bluetooth antenna and the Wi-Fi antenna, An integrated Bluetooth / Wi-Fi antenna system for detecting the antenna validity, characterized in that for determining the open state or the short (short) of the fastening state. The method of claim 4, wherein the direct current (DC) component value,
In the case of 100mV ~ 120mV, it is judged as a matching good condition, in the case of 50mV ~ 70mV, it is judged as unmatching, and in the case of 5mV or less, the CD for detecting antenna validity is determined. May integrated Bluetooth / Wi-Fi antenna system. The method of claim 1, wherein the broadband mobile communication network,
Long Term Evolution (LTE), Wideband Code Division Multiple Access (W-CDMA), Wireless Broadband Internet (WiBro), World Interoperability for Microwave Access (WiMAX), High Speed Packet Access (HSPA), Wi-Fi, Bluetooth (BT) CD-May integrated Bluetooth / Wi-Fi antenna system for the antenna validity detection, characterized in that using any one of.
KR1020120000343A 2012-01-03 2012-01-03 All in one cdma and blue tooth, wifi antenna system for detecting effectiveness thereof KR20130079704A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10187091B2 (en) 2014-12-03 2019-01-22 Samsung Electronics Co., Ltd. Device for performing communication and method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10187091B2 (en) 2014-12-03 2019-01-22 Samsung Electronics Co., Ltd. Device for performing communication and method thereof

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