KR20000018968U - RF Front-end System with Antenna for Wireless Local Loop - Google Patents

Abstract

The present invention relates to a subscriber access device of a wireless local loop (WLL), and a path loss by an RF cable connecting the antenna and the RF terminal by making the antenna and the RF stage into one integrated module. It provides a wireless subscriber network subscriber access device that can improve the call quality by removing the.

The antenna and RF terminal integrated wireless subscriber network access device according to the present invention is connected to the RF integrated module integrated the antenna and RF (RF) stage and the connection module for the subscriber and the baseband signal from the RF integrated module It includes a signal processing module that accepts and delivers a signal to the connection module or performs the reverse process.

The antenna and RF terminal integrated wireless subscriber network access device according to the present invention has the antenna and the RF terminal composed of one integrated module to minimize path loss, simplify installation and maintenance, and eliminate the need for cables between the antenna and the RF stage. As a result, manufacturing cost is reduced.

Description

Antenna and RF terminal integrated wireless subscriber network connection device {RF Front-end System with Antenna for Wireless Local Loop}

The present invention relates to a subscriber access device, and more particularly, to a wireless subscriber network (WLL) subscriber access device. Wireless Local Loop (WLL) is a type of wireless access network that uses a wireless system to connect to a subscriber's home instead of a traditional wireline. Such a wireless subscriber network saves the cost and time required to construct a subscriber line compared to the existing wired subscriber network, and can be used as an emergency subscriber line in preparation for natural disasters, and provides various services such as voice, data, fax, and ISDN. It has the advantage of being able to provide.

Because of these advantages, wireless subscriber networks have attracted much attention from new operators seeking to acquire subscribers early, existing operators seeking new customers in urban areas, and developing countries with poor wired network structures. Currently, products developed for wireless subscriber networks include satellite-based systems, cordless systems, fixed microwave systems, and cellular technologies. Among them, they can maintain compatibility with existing cellular systems. Cellular technology systems are most commonly used.

The wireless subscriber network can be configured in various forms according to the applied technology, but basically it consists of a subscriber access device (terminal), a base station, and a base station controller. The subscriber access device is located at the subscriber side to perform transmission and reception of radio signals, radio channel modulation and demodulation, vocoding, and terminal access functions. The subscriber access device has a form separate from a built-in RF (RF) terminal and a handset form. In the case where the RF stage is separately configured, the antenna and the RF stage are connected to each other by cable, which causes a considerable path loss caused by the RF cable and is individually limited and therefore is limited when installed rather than an integrated type. Has

The present invention was devised to solve the above problems of the prior art, and the installation is simplified by integrating the antenna and the RF terminal of the subscriber access device of the wireless subscriber network without any configuration separately, and by the RF cable. The technical problem is to provide a wireless subscriber network subscriber access device that can improve the call quality by eliminating the path loss.

1A is a conceptual diagram of a wireless subscriber network system.

Figure 1b is a simplified configuration diagram of a wireless subscriber network subscriber access device according to the prior art.

Figure 2a is a simplified block diagram of an embodiment of a wireless subscriber network subscriber access device according to the prior art.

Figure 2b is a simplified configuration diagram of one embodiment of the antenna and RF terminal integrated wireless subscriber network connection apparatus according to the present invention.

※ Explanation of codes for main parts of drawing

11, 23. Subscriber access device 12. Base station

13. Base station controller 14, 25. RF module

15. Signal Processing Module 16. Connection Module

17, 21, 24. Antenna 22. RF Cable

26. RF Integration Module

An antenna and an RF terminal integrated wireless subscriber network connection apparatus according to the present invention includes: an RF integrated module for transmitting and receiving an RF signal and converting an RF signal into a baseband signal or a baseband signal into an RF signal; An access module in charge of an access function with a subscriber; And a signal processing module for receiving a baseband signal from the RF integrated module and transferring the baseband signal to the access module or performing the reverse process.

According to the accompanying drawings will be described in detail the characteristics and operation principle of each part of the antenna and RF terminal integrated wireless subscriber network connection device according to the present invention. 1A is a concept of a wireless subscriber network (WLL) system. The subscriber access device 11 is installed on the subscriber side to transmit and receive RF signals with the base station 12, perform functions such as radio channel modulation and demodulation, and perform access to wireless subscriber networks of various communication equipment such as telephones and computer terminals. do. The base station 12 performs a transmission and reception function with the subscriber access device 11 through a wireless channel, and performs power control, channel modulation and demodulation, and protocol conversion function for connection between the subscriber access device 11 and the base station controller 13. Perform. The base station controller 13 is located between the existing PSTN exchanger and the base station 12 to manage the connection between them and to control the base stations 12.

Figure 1b is a simplified configuration diagram of a wireless subscriber network subscriber access device according to the prior art. The RF module 14 transmits and receives an RF signal through the antenna 17 and performs a function such as channel modulation and demodulation to convert the RF signal into a baseband signal or perform the reverse process. The signal processing module 15 exchanges baseband signals with the RF module 14 and connects with various subscriber stations through the connection module 16.

Figure 2a is a simplified block diagram of an embodiment of a wireless subscriber network subscriber access device according to the prior art. An antenna 21 for transmitting and receiving an RF signal and a subscriber access device 23 connected to various subscriber stations are connected through the RF cable 22.

Figure 2b is a simplified block diagram of an embodiment of an antenna and RF terminal integrated wireless subscriber network connection apparatus according to the present invention. As described above in FIG. 1B, the subscriber access device 18 includes an RF module 14, a signal processing module 15, and a connection module 16. The RF module is connected to an antenna and an RF cable. Therefore, the path loss caused by RF cable cannot be ignored. Especially, as the frequency band of the wireless subscriber network (WLL) increases, the loss becomes larger. Accordingly, the path loss can be minimized by integrating the RF module 25 of the antenna 24 and the subscriber access device with the RF integrated module 26.

The antenna and RF terminal integrated wireless subscriber network access device according to the present invention integrates the antenna and the RF stage to form a single RF module, thereby minimizing the path loss caused by the RF cable connecting the antenna and the RF stage, and one integrated module. It is easy to install, maintain and repair, and it does not need RF cable, so the manufacturing cost is reduced.

Claims (2)

An RF integrated module configured to convert the RF signal received from the antenna into a baseband signal and output the baseband signal or perform the reverse process to transmit the RF signal through the antenna; An access module in charge of an access function with a subscriber; And An RF end integrated wireless subscriber network connection device including a signal processing module that receives a baseband signal from the RF integrated module and transmits it to the access module or performs the reverse process. The method of claim 1, By integrating the RF stage into the rear end of the antenna and configuring one RF integrated module, the path loss caused by the RF cable is minimized, and the integrated module is configured to simplify the installation, maintenance, and maintenance. Wireless subscriber network connection device