KR19990040394A - A mobile communication method having a tracking antenna and a mobile communication terminal device having a tracking antenna suitable for performing the same. - Google Patents

Abstract

A mobile communication method having a tracking antenna and a mobile communication terminal device having a tracking antenna suitable for performing the same are disclosed. The tracking antenna unit is used to perform transmission / reception between the base station and the mobile station (terminal device). At this time, the power detector detects the received power. Meanwhile, the microcomputer receives and stores the received power from each tracking antenna cell from the power sensing unit, selects the largest value among the stored values, and transmits / receives a signal with the base station for a predetermined time using the tracking antenna cell that receives the signal. After receiving a predetermined time, the received antenna transmits and receives the received power value from the tracking antenna cell and its neighboring cell, selects the largest value, and transmits / receives with the transmitting base station using the received tracking antenna. Continue. Therefore, the call quality of the mobile communication terminal can be optimally maintained, and the present invention can be applied even when a high frequency signal having severe attenuation characteristics is used to quickly transmit / receive a large amount of data.

Description

A mobile communication method having a tracking antenna and a mobile communication terminal device having a tracking antenna suitable for performing the same.

The present invention relates to a mobile communication method having a tracking antenna and a mobile communication terminal apparatus having a tracking antenna suitable for performing the same. More particularly, the present invention relates to a mobile communication terminal having a tracking antenna. It is to enable communication without reducing the energy level.

In today's mobile communications, vertical antennas with non-directional directivity in the horizontal plane are commonly used, such as sleeve antennas, brown antennas, colinear antennas, and whip antennas.

1 shows a sleeve antenna.

As shown in Fig. 1, a coaxial cable connects the vertical conductor of lambda / 4 to the inner conductor, and the outer conductor connects the tubular tube (sleeve) of lambda / 4 to the coaxial cable. The principle of operation is to operate as a vertical half-wave dipole with vertical conductors and sleeves, so the input impedance, gain and directivity are the same as for half-wave dipoles. In addition, since the sleeve resists unbalanced current, it works well by directly connecting to a 75Ω coaxial cable.

2 shows a brown antenna (or referred to as branch antenna).

Instead of the cylindrical tube of the sleeve antenna of FIG. 1, as shown in FIG. Inside the antenna element, the current in the vertical conductor is related to radiation, while the horizontal conductor is not related to radiation because currents in opposite directions flow through each other. For this reason, it operates as an antenna of vertical polarization. Moreover, even if an unbalanced feed line is connected by the current of a horizontal conductor, an unbalanced current does not flow. However, if the radiation resistance is low and four horizontal conductors are about 20 ohms, a matching circuit is required to connect a 50 Ω or 75 Ω coaxial cable. As shown in Fig. 2 (b), there is a method such as raising the position of the feed point from the branch line in order to change the angle of the holded branch or branch line.

3 shows a Coronia array antenna.

As shown in FIG. 3, a multiply overlapping λ / 2 coaxial antenna is referred to as a coronia array antenna. If the length of the device is simply increased, the current in the dipoles of each stage is reversed, so there is no gain in the horizontal direction, but the power is supplied by shifting the phase of each coaxial antenna by 180 °. It becomes an antenna. The impedance of the feed point is matched by a method of changing the position of the feed point. There is also an antenna that operates as a multi-stage vertical antenna by inserting the λ / 2 abnormal circuit every halfway of the disconnection.

4 shows a whip antenna.

The sleeve antenna, brown antenna (also referred to as branch antenna), and coronia array antenna are frequently used for base stations by attaching them to props as well as automobiles and ships, but are usually used only for moving objects, and there are whip antennas. As shown in Fig. 4, the structure is composed of only λ / 4 vertical conductors, and the outer conductor of the coaxial cable is directly connected to the movable body. The characteristics such as the actual directivity vary somewhat due to the influence of the vehicle body, but in theory, they operate similarly to the vertical ground antenna, so the characteristics may be treated the same. Since the radiation resistance is about 40Ω, it can be directly connected to a 50Ω coaxial cable.

Antennas of this kind are particularly suitable in the frequency range of 30 MHz to 3 GHz. However, for the purpose of improving call quality and transmitting video signals, the frequency of mobile communication service is increasing, and even K-Band (18 ~ 26.5㎓), Ka-Band (26.5 ~ 40㎓) or even 60㎓ is proposed. have. However, when the frequency is high, there is a problem that the air attenuation is severe, and also the burden of high output is accompanied.

The present invention has been made to solve the above-mentioned problems, the second object of the present invention is the frequency band of the mobile communication service K-Band (18 ~ 26.5kHz), Ka-Band (26.5 ~ 40kHz) or its It is an object of the present invention to provide a mobile communication method having a tracking antenna for transmitting and receiving signals without severe air attenuation up to 60 Hz.

It is a second object of the present invention to provide a mobile communication terminal apparatus having a tracking antenna which is particularly suitable for performing the above method.

1 shows a sleeve antenna.

2 shows a brown antenna (or referred to as branch antenna).

3 shows a Coronia array antenna.

4 shows a whip antenna.

5 is a block diagram of a mobile communication terminal device having a tracking antenna according to an embodiment of the present invention.

6 is a flowchart illustrating the operation principle of FIG. 5 in connection with a microcomputer.

<Description of Symbols for Main Parts of Drawings>

12: tracking antenna portion 14: variable attenuator portion

16: phase delay unit 20: power detector

30: micom

In order to realize the first object of the present invention, the present invention

(a) storing each power detection signal generated by sensing power of signals provided from each tracking antenna unit; (b) selecting a signal having the highest power among the power detection signals generated in step (a); (c) transmitting and receiving a signal to and from the base station for a predetermined time using a tracking antenna cell having the highest power selected in step (b); (d) if a predetermined time has elapsed, receiving and storing signals of a power sensing signal of a tracking antenna cell having the largest value and signals sensed with power from an adjacent cell of the tracking antenna cell having the largest value; (e) selecting a value having the largest power among the power detection signals generated in step (d); And (f) repeating the steps (c), (d), and (e).

In order to realize the second object of the present invention, the present invention

A tracking antenna unit for transmitting a signal from a mobile station (not shown) to a base station (not shown) or receiving a signal from the base station; A power detector configured to receive a plurality of received signals from the tracking antenna unit and sense respective powers to generate a plurality of detection signals; And a tracking antenna configured to receive a plurality of sensing signals provided from the power detector, store the plurality of sensing signals, and select a tracking antenna at a position corresponding to the sensing signal of the largest power from the tracking antenna unit. Provides a terminal device.

According to the present invention described above, only one tracking antenna cell is used by sensing power of the entire tracking antenna cell in the tracking antenna unit during the initial operation of the mobile communication system, and then the surroundings of the used tracking antenna cell thereafter. By using only one tracking antenna cell that detects power up to and outputs a large value of the cell, it is possible to change the antenna cell used by searching only the surrounding antenna cells without searching the entire antenna cell.

Hereinafter, with reference to the accompanying drawings, it will be described in detail the present invention through an embodiment of the present invention.

5 is a block diagram of a mobile communication terminal device having a tracking antenna according to an embodiment of the present invention.

Referring to FIG. 5, the mobile communication terminal device having the tracking antenna includes a tracking antenna unit 10, a power detector 20, and a microcomputer 30.

The tracking antenna unit 10 is composed of a tracking antenna unit 12, a variable attenuator unit 14 and a phase delay unit 16 to receive a signal from a base station (not shown) or to transmit a signal to a base station from a mobile station. Send.

At this time, the tracking antenna unit 12 is composed of a plurality of tracking antenna cells (12I, 12II, 12III, 12IV, ...., 12n) arranged at regular intervals in a matrix structure on the surface of the dielectric placed in a plane. After receiving a signal from a base station (not shown) and exciting with a constant relative phase, the excitation signals A1, A2, A3,... An are provided to the variable attenuator unit 14.

The variable attenuator unit 14 is composed of a plurality of variable attenuators 14I, 14II, 14III, 14IV,... 14n in order to attenuate the power of the signal received from the tracking antenna cell unit 12. The power of the signal received from the antenna cell unit 12 is attenuated.

The phase delay unit 16 is composed of a plurality of phase delay units 16I, 16II, 16III, 16IV,... 16n to delay the phase of the signal provided from the variable attenuator unit 14 and then phase delay the signal. (C1, C2, C3, ... Cn).

The power detector 20 detects the received power of the signal provided from the tracking antenna unit 10.

The microcomputer 30 stores the values received from the tracking antenna unit 10 and selects the tracking antenna cell corresponding to the largest value among them.

The operation of the mobile communication terminal having the tracking antenna configured as described above will be described in more detail with reference to the accompanying drawings.

6 is a flowchart illustrating the operation principle of FIG. 5 in connection with a microcomputer.

The second power generated by sensing the power of the signal C1 provided from the first tracking antenna unit and storing the first power detection signal D _C1 generated by sensing the power of the signal C2 provided from the second tracking antenna unit The detection signal D _C2 is stored, and the above process is stored up to the n th power detection signal D _Cn generated by sensing the power of the signal Cn provided from the n th tracking antenna unit to which the last tracking antenna cell belongs. The operation continues (step S1).

Then, the signal having the largest value among the power sensing signals D _C1, D _C2, D _C3,..., D _Cn through the above process is selected (step S2).

Using the tracking antenna cell C _H having generated the largest value, a signal is transmitted and received with a base station for a predetermined time (in the present invention, a predetermined time is set to 5 seconds) (step S3).

If passed since a certain period of time, eight cells (Ca around the power detect signal (D _CH) and a tracking antenna cells (C _H) of the greatest value of the largest value of the tracking antenna the cell (C _{H) of, Cb,} Cc _, Cd _, Ce _, Cf _, Cg and Ch) receives signals from the power sensing signals (D _Ca , D _Cb , D _Cc , D _Cd , D _Ce , D _Cf D _Cg and D _Ch ) and stores them (Step S4).

Thereafter, among the signals D _CH, D _Ca , D _Cb , D _Cc , D _Cd , D _Ce , D _Cf D _Cg and D _Ch generated in step (4), the value with the largest power is selected ( Step S5).

Then step S3 described above is repeated.

If a certain time has passed since then, the above steps S4 and below are repeated. At this time, as the tracking antenna cells of the largest value change, the surrounding tracking antenna cells will also change.

According to the present invention described above, only the first tracking antenna cell in the tracking antenna unit detects power and uses a single tracking antenna cell at the time of operation of the system, and thereafter, a cell around the used tracking antenna cell. By using only one tracking antenna cell that detects power up to and outputs a large value, it is possible to change the antenna cell to be used by searching only the antenna cells around it without searching the entire antenna cell.

In addition, by forming the antenna cells in a fine micro strip (micro strip) structure to find the optimal antenna cell and use it can prevent the degradation of the signal caused by the transmission and reception of the signal even if the mobile station changes position.

As described above, according to the present invention, power is sensed for all the tracking antenna cells in the tracking antenna unit only during the initial operation of the system, and then one tracking antenna cell is used. By using only one tracking antenna cell to sense power up to the cell, it is possible to change the antenna cell to be used by searching only the antenna cells around it without searching the entire antenna cell.

In addition, by forming a plurality of antenna cells in a fine micro strip structure to find an optimal antenna cell and use it, it is possible to prevent signal degradation caused by transmission and reception of signals even if the mobile station changes its position.

In addition, when the mobile station antenna tracks the mobile station with a gain of several tens of megahertz toward the base station, the number of base stations is reduced, and a real consumer spends a small amount of money for a tens of megahertz mobile communication service, You can receive video service.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the present invention without departing from the spirit and scope of the invention described in the claims below. I can understand that you can.

Claims (5)

_. (a) The signals provided from each of the tracking antenna unit _{(C1, C2, C3,.} ..., Cn) each of the power detection signal generated by detecting the power of the _{(D C1, D C2, D} C3,..., Storing D _Cn ); (b) selecting a signal having the highest power value among the power sensing signals D _C1, D _C2, D _C3,..., D _Cn generated in step (a); (c) transmitting and receiving a signal to and from the base station for a predetermined time using a tracking antenna cell (C _H ) having the highest power selected in step (b); (d) If a certain time has elapsed, the power sensing signal D _{CH of} the largest tracking antenna cell C _H and the adjacent cells Ca _, Cb _, of the largest tracking antenna cell C _H are passed _. Cc _, Cd _, Ce _, Cf _, Cg _, Ch) receives signals from the power detection signals (D _Ca , D _Cb , D _Cc , D _Cd , D _Ce , D _Cf D _Cg , D _Ch ) and stores them Doing; (e) The highest power value among the power detection signals (D _CH, D _Ca , D _Cb , D _Cc , D _Cd , D _Ce , D _Cf D _Cg , D _Ch ) generated in step (d) Selecting a; And and (f) repeating the steps (c), (d) and (e). A tracking antenna unit 10 for transmitting a signal from a mobile station (not shown) to a base station (not shown) or receiving a signal from the base station; A power detector (20) for receiving a plurality of received signals from the tracking antenna unit (10) and detecting power of each of the received signals to generate a plurality of detected signals; And Receives and stores a plurality of sensing signals provided from the power detector 20 to the microcomputer 30 for selecting a tracking antenna of the position corresponding to the sensing signal of the largest power from the tracking antenna unit 10. A mobile communication terminal having a tracking antenna, characterized in that configured. The method of claim 2, wherein the tracking antenna unit 10 A tracking antenna cell unit 12 composed of a plurality of tracking antenna cells 12I, 12II, 12III,..., And 12n, which receive a signal from a base station (not shown) and are excited with a constant relative phase; A variable attenuator unit (14) composed of a plurality of variable attenuators (14I, 14II, 14III,..., And 14n) to attenuate the power of the signal received from the tracking antenna cell unit 12; And A tracking characterized in that it consists of a phase delay unit (16) consisting of a plurality of phase delays (16I, 16II, 16III, ..., and 16n) to delay the phase of the signal provided from the variable attenuator unit (14). A mobile communication terminal device having an antenna. The tracking antenna cell unit 12 is a plurality of tracking antenna cells 12I, 12II, 12III,... 12n), wherein the mobile communication terminal device having a tracking antenna. The mobile communication terminal device of claim 2, wherein the tracking antenna cell unit 12 comprises one tracking antenna unit comprising one tracking antenna cell, one variable attenuator, and one phase retarder. .