KR20130048553A - Wifi module with interior and exterior antenna - Google Patents

Wifi module with interior and exterior antenna Download PDF

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Publication number
KR20130048553A
KR20130048553A KR1020110113453A KR20110113453A KR20130048553A KR 20130048553 A KR20130048553 A KR 20130048553A KR 1020110113453 A KR1020110113453 A KR 1020110113453A KR 20110113453 A KR20110113453 A KR 20110113453A KR 20130048553 A KR20130048553 A KR 20130048553A
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KR
South Korea
Prior art keywords
antenna
function
external
switch
module
Prior art date
Application number
KR1020110113453A
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Korean (ko)
Inventor
황거훈
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to KR1020110113453A priority Critical patent/KR20130048553A/en
Publication of KR20130048553A publication Critical patent/KR20130048553A/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
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/02—Inter-networking arrangements

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

Abstract

In-vehicle Wi-Fi module for an internal external antenna of the present invention includes a first antenna for use as a WLAN function and a second antenna for use as a function of a wireless router (AP); An antenna switch unit for selecting the first antenna or the second antenna; And a controller for controlling the antenna switch unit by generating a switch control signal according to the function selection signal after receiving a function selection signal selected to be operated by the WLAN function or the AP function. Has technical features.

Description

WIFI MODULE WITH INTERIOR AND EXTERIOR ANTENNA}

The present invention relates to a vehicle Wi-Fi module for a combined external antenna, more specifically, to solve the problem of lowering the transmission speed of the WLAN (WLAN) and security weakness of the wireless router (AP) generated when only one antenna is used. In addition, the present invention relates to a vehicle Wi-Fi module for an internal and external antenna that uses an external passive antenna as a WLAN function and uses an internal passive antenna as a wireless router function.

The number of wireless protocols provided within portable electronic devices such as mobile phones, PDAs, mobile computing devices, etc. is increasing due to the demand for more functions and more services in the communications industry. Thus, more antennas are required to enable various wireless protocols within such mobile devices.

Meanwhile, when the Wi-Fi communication module is applied to a mobile device such as a mobile phone, a notebook, an iPad, etc. to provide portability and convenience, the antenna generally uses an internal antenna.

Products like Access Points (APs), on the other hand, use external antennas for maximum performance and cover range in a fixed location.

The WIFI module largely provides a wireless LAN (WLAN) function and a router function.

Wireless LAN (WLAN) function allows each terminal to access the Internet through a wireless router (AP), and the wireless router (AP) function has the same function as a router in a wired LAN, while wirelessly wirelessly surroundings. It is a function that helps devices equipped with the Internet to access the Internet and is commonly called a WIFI zone.

1 shows a general configuration of a conventional Wi-Fi module.

Referring to FIG. 1, a conventional Wi-Fi module 100 includes a controller 110, a Wi-Fi baseband modem 120, a power amplifier 130, a low noise amplifier 140, a duplexer 150, and an antenna 170. do.

 Hereinafter, a brief description will be given of a general transmission / reception path by the conventional Wi-Fi module 100.

 Looking at the transmission path sequentially, the transmission data received from the control unit 110 is modulated (modulated) via the Wi-Fi baseband modem 120 to generate a Wi-Fi digital signal. After the Wi-Fi (WIFI) digital signal is converted into an analog signal and input to the power amplifier 130, the power is amplified through the power amplifier 130, the path transmitted to the antenna 170 through the duplexer 150 Has

On the other hand, when the reception path is sequentially viewed, when the analog RF signal received from the antenna 170 is input to the low noise amplifier 140 through the duplexer 150, the low noise amplifier 140 amplifies while suppressing noise. After the RF signal is converted into a digital signal and sent to the Wi-Fi baseband modem 220, the Wi-Fi baseband modem 120 demodulates the received RF signal (demodulation) to generate digital received data and then the control unit 110 Has a route to send to

However, the conventional Wi-Fi module 100 has the following problems by using only a single internal antenna or a single external antenna for the audio of the vehicle.

That is, when performing a WLAN function and a router function using only a single built-in antenna, the cover range is narrowed so that only mobile devices inside the vehicle can be accessed. Although the device is inaccessible, security is enhanced, but since the audio itself is a shield, a lot of loss of wireless signal occurs, which shortens the communication distance with the external router. In other words, the transmission speed was lowered.

On the other hand, when performing a WLAN function and a router function using only a single external antenna, the radio wave environment is improved and the antenna radiation characteristic is improved, thereby increasing the cover range. Although the communication distance with the wireless router (AP) is long and the transmission speed is high, a disadvantage is vulnerable to security because a wide cover range is formed that can be easily accessed not only inside the vehicle but also external devices. there was.

The technical problem to be solved by the present invention, in order to solve the problem of lowering the transmission speed of the WLAN (WLAN) caused by using only one antenna and the security vulnerability of the wireless router (AP), the external passive antenna to the wireless LAN ( The present invention provides a Wi-Fi module for a vehicle using both an internal and external antenna that uses a WLAN function and uses a built-in passive antenna as a wireless router (AP) function.

In accordance with an aspect of the present invention, there is provided a Wi-Fi module for a combined external antenna, including: a first antenna for use as a WLAN function and a second antenna for use as a function of a wireless router (AP); An antenna switch unit for selecting the first antenna or the second antenna; And a controller for controlling the antenna switch unit by generating a switch control signal according to the function selection signal after receiving a function selection signal selected to be operated by the WLAN function or the AP function. do.

The present invention has a technical effect that can solve the problem of lowering the transmission speed of WLAN (WLAN) in the vehicle and security vulnerability of the wireless router (AP).

1 shows a general configuration of a conventional Wi-Fi module.
Figure 2 shows the configuration of an internal exterior antenna combined vehicle Wi-Fi module according to the present invention.

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

Figure 2 shows the configuration of an internal exterior antenna combined vehicle Wi-Fi module according to the present invention.

Referring to FIG. 2, the Wi-Fi module 200 for an internal / external antenna according to the present invention includes a control unit 210, a Wi-Fi baseband modem 220, a first gain amplifier 230, a second gain amplifier 240, The duplexer 250 includes an antenna switch unit 260 and an antenna group 270.

The control unit 210 is composed of a general CPU (CPU), and is selected to be operated by a WLAN function (“0”) or a router function (“1”) of a WIFI module. After receiving the function selection signal, the switch control signal is generated according to the function selection signal to control the first RF switch 241 to the third RF switch 243.

In the case of a transmission path, the Wi-Fi baseband modem 220 modulates the transmission data received from the control unit 210 into a predetermined format (for example, QPSK, BPSK, DQPSK, 64QAM, etc.) to convert a Wi-Fi digital signal. Create

Meanwhile, in the case of the reception path, the Wi-Fi baseband modem 220 demodulates the received Wi-Fi digital signal, generates received data, and sends the received data to the control unit 210.

The first gain amplifier stage 230 includes a first power amplifier 232 on the transmit path and a first low noise amplifier 234 on the receive path.

The first power amplifier 232 receives a Wi-Fi digital signal converted into an analog form through a digital-to-analog converter (not shown) and amplifies power primarily.

The first low noise amplifier 234 amplifies an analog signal received from the antenna while suppressing noise, and then the amplified signal is converted into a digital signal through an analog-to-digital converter (not shown) to form a Wi-Fi baseband modem 220. Is sent).

The second gain amplification stage 240 is configured to replace the first RF switch 241 on the transmission path, the second power amplifier 242 and the second RF switch 243 on the receive path, and the second low noise amplifier 244. Include.

The first RF switch 241 transmits a signal to the external passive antenna 271 and switches on when using the Wi-Fi (WLAN) function (when the function selection signal is “0”). The power amplifier 242 is connected to amplify the power once more, but if not (if the function selection signal "1") switching off (OFF) further amplification by the second power amplifier 242 Do not let it.

Similarly, when the second RF switch 243 receives a signal from the external passive antenna 271 and uses the Wi-Fi as a WLAN function (when the function selection signal is “0”), the second RF switch 243 receives the signal. The first low noise amplifier 244 is connected to the first low noise amplifier 244 by connecting the first low noise amplifier 244 and then amplifying the noise while suppressing the noise through the low noise amplifier 244. When the selection signal "1") is switched off (OFF) so that the second low noise amplifier 244 does not operate.

Here, the function selection signal “0” means a function selection signal when using Wi-Fi as a WLAN function by transmitting / receiving a signal with the antenna 271 for an external number, and selecting the function selection signal “1”. In the case of means a function selection signal when using the Wi-Fi (WIFI) as a wireless router (AP) function by transmitting and receiving a signal with the built-in passive antenna 272.

In the case of the present invention, the reason for adding the second gain amplifier stage 240 is different from the related art, in the case of installing the external passive antenna 271 outside the vehicle, a feeder cable is used. In this case, the feeder cable This is because gain adjustment of the first power amplifier 232 and the first low noise amplifier 234 according to the length is necessary.

For example, if the length of the feeder cable (feeder cable) is about 5m, the cable loss (cable loss) at 2.4Ghz has a magnitude of about 6dB ~ 8dB, the second gain amplifier stage 240 to compensate for this loss is essentially Although requested, the cable loss is negligible when the length of the feeder cable is about 0.5m, and thus the installation of the second gain amplifier stage 240 may be omitted.

The duplexer 250 was developed to share a transmission signal and a reception signal using a single transmission line or antenna, so that the transmission signal on the transmission path may be an external passive antenna 271 or an internal passive antenna in the antenna group 270. The signal is transmitted to the antenna 272 without interference of the received signal, and the received signal on the reception path is transmitted from the external passive antenna 271 or the internal passive antenna 272 in the antenna group 270 without interference of the transmitted signal.

Antenna group 270 includes an external passive antenna 271 and an internal passive antenna 272.

Here, a monopole antenna, a dipole antenna, etc. may be used as the external passive antenna 271, and a chip antenna, a pattern antenna, a pattern antenna, and the like may be used as the internal passive antenna 272. Ceramic antennas and the like can be used.

 In the present invention, the reason why the external passive antenna 271 is selected as the WLAN function of the Wi-Fi (when the function selection signal is “0”) is compared with the case where the internal passive antenna 272 is used. This is because the environment is improved and the antenna radiation characteristics are improved, thereby increasing the cover range and increasing the transmission speed.

On the other hand, the reason why the internal passive antenna 272 is selected as a wireless router (AP) function of the WIFI (when the function selection signal is “1”) is compared to the external passive antenna 271. The cover range is narrow so that it can be accessed only, so that mobile devices outside the vehicle are inaccessible and thus the security is enhanced.

That is, in order to solve the problem of lowering transmission speed of WLAN and security vulnerability of AP, which is generated when using only one conventional antenna, the external passive antenna 271 may be connected to WLAN. ) And the built-in passive antenna 272 as a wireless router (AP) function has a technical feature.

The antenna switch unit 260 is a switch for selecting the external passive antenna 271 or the internal passive antenna 272 and includes a third RF switch 261.

The third RF switch 261 is connected to the external passive antenna 271 by a switching operation when the function selection signal “0” for using the Wi-Fi as the WLAN function, and the Wi-Fi. In the case of the function selection signal "1" for using as a wireless router (AP) function by connecting to the built-in passive antenna 272 by a switching operation to enable transmission and reception.

Hereinafter, the operation in the case of the function selection signal "0" and the function selection signal "1" according to the present invention will be briefly described.

First, when the function selection signal “0” is input to the controller 210, the first RF switch 241 and the second RF switch 243 are set to the function selection signal “0”.

In this case, the first RF switch 241 is switched on to operate the second power amplifier 242, and the second RF switch 243 is switched on to operate the second low noise amplifier 244. .

On the other hand, the third RF switch 261 is switched on (ON) is connected to the external antenna 271 for a number of times, the transmission and reception signals can be transmitted to use the Wi-Fi (WIFI) as a WLAN (WLAN) function.

On the other hand, when the function selection signal “1” is input to the controller 210, the first RF switch 241 and the second RF switch 243 are set to the function selection signal “1”.

At this time, the first RF switch 241 is switched off to prevent the second power amplifier 242 from operating, and the second RF switch 243 is switched off to turn off the second low noise amplifier 244. Do not work.

On the other hand, the third RF switch 261 is switched on (ON) is connected to the built-in passive antenna 272, the transmission and reception signals can be transmitted to use the Wi-Fi (WIFI) as a wireless router (AP) function.

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.

100: conventional wifi module
110: control unit 120: wifi baseband modem
130: power amplifier 140: low noise amplifier
150: duplexer 170: antenna
200: Wi-Fi module for an internal external antenna of the present invention
210: control unit 220: WiFi baseband modem
230: first gain amplifier stage
232: first power amplifier 234: first low noise amplifier
240: second gain amplifier stage
241: first RF switch 243: second RF switch
242: second power amplifier 244: second low noise amplifier
250: duplexer
260: antenna switch unit
270 antenna group
271: external passive antenna 272: internal passive antenna

Claims (8)

A first antenna for use as a WLAN function and a second antenna for use as a router function;
An antenna switch unit for selecting the first antenna or the second antenna; And
And a controller configured to control the antenna switch unit by generating a switch control signal according to the function selection signal after receiving a function selection signal selected to operate by the WLAN function or the AP function. WiFi module for both external antennas. The method of claim 1, wherein the first antenna,
WiFi module for both internal and external antennas, characterized by using an external passive antenna. The method of claim 2, wherein the external passive antenna,
Wi-Fi module for both internal and external antennas, characterized by using a monopole antenna or a dipole antenna. The method of claim 1, wherein the second antenna,
Wi-Fi module for both internal and external antennas, characterized by using a built-in passive antenna. The method of claim 4, wherein the built-in passive antenna,
Wi-Fi module for an internal and external antenna, characterized by using any one of a chip antenna, a pattern antenna, and a ceramic antenna. The method of claim 1,
The first antenna is an external passive antenna,
Wi-Fi module for both internal and external antennas, further comprising a gain amplifier stage for compensating for losses due to a feeder cable. The method of claim 6, wherein the gain amplifier stage,
An internal external antenna combined Wi-Fi module, comprising: an RF switch controlled by a switch control signal of the controller located on a transmission path and a power amplifier for amplifying power when the RF switch is turned on. . The method of claim 6, wherein the gain amplifier stage,
An internal and external antenna, comprising an RF switch controlled by a switch control signal of the controller and a low noise amplifier for amplifying with low noise when the RF switch is turned on. WIFI module.
KR1020110113453A 2011-11-02 2011-11-02 Wifi module with interior and exterior antenna KR20130048553A (en)

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Application Number Priority Date Filing Date Title
KR1020110113453A KR20130048553A (en) 2011-11-02 2011-11-02 Wifi module with interior and exterior antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110113453A KR20130048553A (en) 2011-11-02 2011-11-02 Wifi module with interior and exterior antenna

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KR20130048553A true KR20130048553A (en) 2013-05-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016073256A1 (en) * 2014-11-04 2016-05-12 Matthew Wootton Intelligent electrical switch
WO2016179959A1 (en) * 2015-05-12 2016-11-17 惠州Tcl移动通信有限公司 Wireless terminal and data receiving and sending method thereof
US10924153B2 (en) 2019-02-18 2021-02-16 Ford Global Technologies, Llc Systems and methods for an external vehicle wireless connection
US11246207B2 (en) 2014-01-27 2022-02-08 Ivani, LLC Systems and methods to allow for a smart device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11246207B2 (en) 2014-01-27 2022-02-08 Ivani, LLC Systems and methods to allow for a smart device
US11612045B2 (en) 2014-01-27 2023-03-21 Ivani, LLC Systems and methods to allow for a smart device
WO2016073256A1 (en) * 2014-11-04 2016-05-12 Matthew Wootton Intelligent electrical switch
WO2016179959A1 (en) * 2015-05-12 2016-11-17 惠州Tcl移动通信有限公司 Wireless terminal and data receiving and sending method thereof
US10340974B2 (en) 2015-05-12 2019-07-02 Huizhou Tcl Mobile Communication Co., Ltd. Wireless terminal and data receiving and transmitting methods thereof
US10924153B2 (en) 2019-02-18 2021-02-16 Ford Global Technologies, Llc Systems and methods for an external vehicle wireless connection

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