KR20130095460A - Multi-band and multi-polarization of adjustable antenna for mobile communication - Google Patents

Abstract

PURPOSE: A multi-band and multi-polarization variable antenna for mobile communication is provided to improve efficiency of base station network operation, by providing multiple input multiple output (MIMO) performance. CONSTITUTION: A number of radiation elements (110,120) are formed with the circular form. The radiation elements are vertically multi-arrayed. A number of polarization generation units (250-1-205-n) provide the predetermined polarization to the radiation elements. The polarization generation units make the radiation elements radiate vertical polarization or circular polarization. A power divider (210) provides a feed signal to the polarization generation unit. [Reference numerals] (110&120) Radiation elements (low and high band); (202) Low band limiting filter; (204) High band limiting filter; (206) Low band phase shifter; (208) High band phase shifter; (210) Power divider; (220) Digital switch; (230) Micro strip phase controller; (240) Fixed cable feeder; (AA) Low band RF; (BB) High band RF

Description

Multi-band And Multi-Polarization of Adjustable Antenna for Mobile Communication

The present invention relates to an antenna applied to a base station or relay station for mobile communication, and more particularly, multiband multipolarization which can simultaneously service various polarizations such as vertical polarization, ± 45 degrees polarization, circular polarization (left rotation polarization, right rotation polarization). It relates to a variable antenna.

In general, a mobile communication base station or a repeater antenna is implemented by any one of a vertical polarization antenna, a ± 45 degree polarization antenna, and a circular polarization antenna, and serves mainly in a fixed polarization form. The vertically polarized antenna is a vertical arrangement of dipoles, which are internal radiating elements of the antenna, and the ± 45 degree polarized antenna is arranged in a cross shape of ± 45 degrees, that is, in a cross form. It means the antenna whose electric field component has ± 90 degree phase difference and the polarization component is arranged as left turn polarization or right turn polarization.

Such fixed polarized antennas provide services by maintaining their respective independent polarizations, and due to the nature of the radiating elements inside the antennas, it is difficult to provide integrated functions and thus cannot serve multiple polarizations simultaneously. In particular, in the mobile communication environment, due to multipath fading such as high-rise buildings, buildings, and steel towers, some shaded areas are generated in the lower part of the building or in the dense residential area. Reached. In addition, according to the advancement of communication technology, an antenna of MIMO (Multiple Input Multiple Output) type that can simultaneously service various polarizations is required.

The present invention has been proposed to meet the above needs, and an object of the present invention is to replace a service antenna for a mobile communication base station or an antenna for a relay station with various polarizations, that is, vertical polarization, ± 45 degree polarization, and circular polarization. By improving the efficiency of the base station network operation by providing MIMO performance, and to provide a multi-band multi-polarization variable antenna for a mobile communication base station or relay station suitable for next-generation high-speed data communication services.

In order to achieve the above object, the antenna of the present invention is formed in a circular shape and a plurality of radiation elements arranged in a vertical multi-stage; A plurality of polarization component generators for generating a predetermined polarization component and providing the radiation elements to the radiation elements so that the radiation elements radiate vertical polarization, ± 45 degree polarization or circular polarization; And a power divider for distributing a feed signal and providing the polarization component generator to simultaneously implement vertical polarization, ± 45 degree polarization, and circular polarization. The dipole, which is a radiation element, may be implemented in a circular or octagonal shape.

The plurality of radiating elements are divided into a low band radiating element and a high band radiating element, and the low band radiating element is a disk-shaped primary radiating element protruding on a front surface of a reflecting plate, and a front portion of the primary radiating element. It consists of a circular parasitic element that protrudes to act as a waveguide, and the spacing between the primary radiation element and the parasitic element is 0.1λ to 0.5λ.

The polarization component generating unit is implemented by any one of a digital switch, a microstrip phase controller and a fixed cable feed line, and the digital switch is composed of a 3-bit FET, and the microstrip phase controller is a fixed phase control dielectric pattern having a pattern formed thereon. A phase control dielectric and a mobile phase control dielectric having a mobile phase control dielectric pattern formed thereon, and an input line connected to an input connector is formed at one side of the fixed phase control dielectric pattern, and an output line connected to an output connector at the other side. And the input line and the output line are coupled through a pattern of the moving phase control dielectric, and the phases are changed according to the coupling position.

Multiband multipolar polarization variable antenna according to the present invention is expected to play a key function in the next generation high-speed data transmission using the multipolarization principle. That is, the conventional independent single polarization has a limitation in increasing the data transmission rate in the future, and according to the present invention, it is possible to improve the transmission speed by implementing multiple polarizations in one antenna.

In addition, the antenna according to the present invention may help improve network coverage by implementing circular polarization. That is, since circular polarization itself uses a diffraction component, it is possible to improve reception performance by diffraction in a shaded or dense area.

In the related art, in order to implement circular polarization, the antenna is mounted inside and outside the antenna in the form of a hybrid, but the MIMO antenna of the present invention is a form in which circular polarization is implemented at an internal radiation element stage. It is also excellent in terms of implementation, and the implementation of multi-polarization inside the antenna can be achieved relatively simply.

1 is a front view of a multiband multipolarization variable antenna according to the present invention;
FIG. 2 is a side view of the multiband multipolar polarization variable antenna shown in FIG. 1;
3 is a rear view of the multi-band multipolarization variable antenna shown in FIG. 1;
4 is an enlarged front view of the low band radiating element shown in FIG. 1;
5 is a side view of the low band radiating element shown in FIG. 4;
6 is an enlarged front view of the low band and high band radiating elements shown in FIG. 1;
7 is a side view of the low band and high band radiating elements shown in FIG. 6;
8 is a schematic diagram showing the overall configuration of a base station antenna system for mobile communication to which the present invention is applied;
9 is a block diagram illustrating a digital switch shown in FIG. 8;
10 is a circuit diagram of the digital switch shown in FIG. 9;
11 is an installation example of the microstrip phase controller shown in FIG. 8;
12 shows the microstrip phase controller assembly shown in FIG. 8;
FIG. 13 shows a dielectric of the microstrip phase controller shown in FIG. 12;
14 is a plan view showing an example of the dielectric movement according to the phase shift in the present invention,
15 is a side view showing an example of a dielectric shift according to a phase shift in the present invention;
16 is a modified example of the multi-band multipolar polarization variable antenna for mobile communication according to the present invention.

The present invention is a technical concept of simultaneously implementing an independent polarization applied to a service antenna for a base station or a relay station at the same time vertical polarization, ± 45 degrees polarization, circular polarization, the specific technical spirit of the present invention will be more clearly through the following examples The following examples are merely illustrative examples and do not limit the scope of the invention.

1 is a front view illustrating a multiband multipolarization variable antenna for a base station according to the present invention, FIG. 2 is a side view of the multiband multipolarization variable antenna shown in FIG. 1, and FIG. 3 is a multiband multiplex shown in FIG. 1. Back view of a polarization variable antenna.

In the multi-band multi-polarization variable antenna 100 according to the present invention, as shown in FIGS. 1 to 3, the low-pass radiation element 110 and the high-pass radiation element 120 are respectively or together installed in front of the reflector plate 102. The low-pass radiating element 110 is composed of a primary radiating element 111, which is fed to four feed units, and a parasitic element 112 serving as a waveguide. 120, two different polarizations are radiated in a cross form. The conductor of the high-frequency radiating element 120 is made of a PCB form, the feed type uses a feed line using a coaxial cable.

In the embodiment of the present invention, the low-frequency radiating element 110 has a circular shape and is easily shaped to be circularly polarized. Circularly polarized waves generally form a circularly polarized component by synthesizing two different polarization elements with two 90 degree phase differences. The multi-band multi-polarization variable antenna 100 for a mobile communication base station to which the present invention is applied uses a circular radiation element for a base station or a relay station, and is capable of maximizing diffraction performance which is characteristic of circular polarization.

As shown in FIG. 3, a low pass phase shifter 206, a high pass phase shifter 208, a low pass filter 202, and a high pass filter 204 are disposed on the rear surface of the reflector 102 of the antenna to which the present invention is applied. The low pass phase shifter 206 is a phase shift device capable of electrically tilting the low pass radiating element 110 listed in FIG. 1 upwardly or downwardly. The high pass phase shifter 208 is a phase shift device capable of electrically tilting the high pass radiating element 120 listed in FIG. 1 upwardly or downwardly. The low pass filter 202 of FIG. 3 serves to shield the high pass component, and the high pass filter 204 serves to shield the low pass component.

4 is an enlarged front view of the low band radiating element illustrated in FIG. 1, and FIG. 5 is a side view of the low band radiating element illustrated in FIG. 4.

As shown in FIGS. 4 and 5, the low-band radiating element 110 according to the present invention includes a circular primary radiating element 111 protruding to the front surface of the reflecting plate 102 by the radiating element support 20. The parasitic element 112 is supported by the radiating element support 20 on the front surface of the primary radiating element 111, and the primary radiating element 111 is fed through four feed units P1 to P4. Vertical polarization, circular polarization, and ± 45 polarization. The primary radiating element 111 may be implemented in the form of a PCB as a conductor, or may be made of a material capable of phase feeding of a metal object, and the parasitic element 112 may be made of a PCB or a material capable of radio wave radiation of a metal object. have.

4 and 5, the primary radiating element 111 is supported on the reflecting plate 102 by the radiating element support 20 while passing through the cable dielectric 12 and the impedance stub 14 to each feed part P1. To P4). In addition, the parasitic element 112 maintains an interval of 0.1λ to 0.5λ of the height of the primary radiation element and variably assembles the height according to the impedance characteristics. Feeding of the primary radiating element 111 is made of a coaxial cable, the portion connected to the primary radiating element 111 is a form in which the dielectric 12 is stripped to some extent, the impedance stub 14 under the dielectric is a cable outer shield In combination with the impedance stub 14 is a structure coupled to the reflecting plate 102, the material of the support 20 for supporting the primary radiation element 111 has a dielectric constant.

The size of the parasitic element 112 serves to determine the impedance band, to determine the beam width of the radiation pattern, it has a function to adjust the beam width of the radiation pattern. Parasitic element 112 is also implemented in a circular shape, as in the front view of Figure 4 is to optimal configuration for circular polarization. The distance between the primary radiating element 111 and the reflecting plate 102 has a spacing of 0.1λ to 0.5λ similar to the parasitic element 112, and by varying the beam width, the beam width is in accordance with the spacing of each phase feeding part of FIG. Will have an important role to change. Impedance stub 14 is responsible for the impedance matching role, that is, the amount of impedance change to effectively copy the output of the primary radiation element 111.

The low-band radiating element 110 is fed through the zero-degree phase feeder (P2, P4) and the 90-degree phase feeder (P1, P3) that can distribute the electric field flow inside to radiate circular polarization through phase synthesis do. In addition, when the 90-degree phase feeder P1 of FIG. 4 is changed to a 180-degree phase feeder, the circularly polarized wave is not used. In order to implement these phases, switching can be used to design phases of 0, 90, and 180 degrees. In addition, fixed-type phases can be used to implement linear and circular polarizations. In other words, the present invention proposes a switching type that gives a phase change through a digital pulse change and a controller type that gives a phase change through a feed line of a microstrip type to establish various polarization conditions as described below. . As described above, the present invention can realize three types, namely, vertical polarization, ± 45 polarization, and circular polarization. In the present invention, three methods for implementing polarization include a fixed cable phase implementation method, a switching method for providing a phase change through a digital pulse change, a phase control method using a microstrip type feeder line, and a fixed cable phase implementation method. have.

FIG. 6 is an enlarged front view of the low band and high band radiating elements shown in FIG. 1, and FIG. 7 is a side view of the low band and high band radiating elements shown in FIG. 6, and the high band radiating element in the low band radiating element 110. 120 is added.

6 and 7, the high band radiating element 120 is implemented on the parasitic element 112 of the low band radiating element 110. The high band radiation element 120 has a polarization component of ± 45 degrees when acting as a general radiation element. The form of the radiation element is also included in the present invention, it is possible to cover a relatively wide band. The high frequency radiating element 120 of FIG. 7 is connected to the high frequency phase shifter 130 by the feeder cable 16 to transmit / receive input / output RF.

8 is a block diagram showing the overall configuration of a multi-band multi-polarization variable antenna system for mobile communication according to the present invention.

As shown in FIG. 8, the multiband multipolar polarization variable antenna system 200 for mobile communication according to the present invention includes a low pass filter 202, a low pass phase shifter 206, a high pass limit filter 204, and a high pass phase shift. Crisis 208, power divider 210, and polarization component generators 250-1 to 250-n for generating polarized signals so that each of the radiating elements can generate vertical polarization, ± 45 polarization, and circular polarization. .

In FIG. 8, as described above, the radiation elements 110 and 120 are arranged such that the low pass radiation element 110 and the high pass radiation element 120 are vertically arranged on the front surface of the reflector plate 102. The polarization component generator 250-1 to 250-n, which is the next stage of the radiation element, includes a digital switch 220, a microstrip phase controller 230, and a fixed cable feed line 240. As described below.

[Digital switch method]

9 is a block diagram illustrating a digital switch shown in FIG. 8, and FIG. 10 is a circuit diagram of the digital switch shown in FIG. 9.

As shown in FIG. 9, the digital switch 220 generating the polarization component according to the present invention includes an RF stage 228, a digital switch stage 221 for changing phase, a beam tilt phase shifter 222, and a CPU. 224, a switch controller 227, an analog-to-digital converter 223, and a PSU 226 for power supply.

The RF stage 228 and the signal processing units 222 to 227 are implemented in a general form, and the digital switch 221, which is one of three forms that generate the polarization component of the present invention, plays a key role. The specific circuit is shown in FIG.

Referring to FIG. 10, the digital switch 221 is configured with a 3-bit FET, and the first phase switch 221a, the second phase switch 221b, and the third phase switch 221c are controlled by respective control signals. Phases of 0 degrees, 45 degrees, 90 degrees, and 180 degrees are output. Q1, Q2 and Q3 of the digital switch 221 are DC power supply sources, and C1, C2 and C3 are control signal sources. In this case, DC power supply of Q1, Q2, Q3 is composed of ON, OFF type, and it is controlled as + 3V when ON and 0V when OFF. At this time, the clock pulse control signal of the switch is normalized to 1 when DC power is ON and 0 when OFF as shown in Table 1 below.

The operating principle of the digital switch 221 for generating the polarization component with the above configuration is as follows.

The first phase switch 221a applies a + 3V power supply to Q1 by the control signal C1 to generate a 45 degree phase. At this time, the second phase switch 221b and the third phase switch 221c are turned off so that a phase of 45 degrees is output to the RF output terminal. As shown in Table 1, the pulse control signal for outputting the 45 degree phase is "1" for the first phase switch 221a, "0" for the second phase switch 221b, and "3" for the third phase switch 221c. Normalize to 0 ".

The second phase switch 221b generates a 90 degree phase by applying a + 3V power supply to Q2 by the control signal C2. At this time, the first phase switch 221a and the third phase switch 221c are turned off to output a phase of 90 degrees to the RF output terminal. As shown in Table 1, the pulse control signal at the time of outputting the 90 degree phase is "0" for the first phase switch 221a, "1" for the second phase switch 221b, and "3" for the third phase switch 221c. Normalize to 0 ".

The third phase switch 221c applies a + 3V power supply to Q3 by the control signal C3 to generate a 180 degree phase. At this time, the first phase switch 221a and the second phase switch 221b are turned off to output a phase of 180 degrees to the RF output terminal. As shown in Table 1, the pulse control signal for outputting a 180 degree phase is "0" for the first phase switch 221a, "0" for the second phase switch 221b, and "2" for the second phase switch 221c. Normalized to 1 ".

In order to set the 0 degree phase in the digital switch 221, when the Q1, Q2, and Q3 power supplies of the first phase switch 221a, the second phase switch 221b, and the third phase switch 221c are all set to OFF, The zero degree phase component at the RF input passes directly to the RF output.

division First phase switch Second phase switch Third phase switch 0 0 0 0 45 One 0 0 90 0 One 0 180 0 0 One

By the above-mentioned operating principle, the phase change of the digital switch 221 and the polarization generation in the radiating element feeder are shown in Table 2 below.

Feeder Vertical polarization Horizontal polarization +45 degrees -45 degrees Left circular polarization Right circular polarization P1 0 ° 0 ° 180 ° 90 ° 270 ° P2 0 ° P3 0 ° 180 ° 0 ° 0 ° P4 0 ° 0 °

The digital switch 221 is connected to the 90 degree phase feed part P1 and the 90 degree phase feed part P3 of the low frequency radiating element 110 to operate independently of each other. The zero-degree phase feeder P2 and the zero-degree phase feeder P4 of the low-pass radiation element 110 maintain their phases at zero degrees.

The 45 degree polarization generation principle is as follows.

The third phase switch 221c of the digital switch 221 generates a phase of 180 degrees through the power supply of Q3 and outputs it to the RF output terminal. The output signal is fed to the 90-degree phase feed section P1 of the low-pass radiation element 110. At this time, the zero-degree phase feeder P2 has a phase of zero degrees, and two feeders are combined to form a 45-degree polarization.

Next is the generation principle of circular polarization.

The phase switch 221b of the digital switch 221 generates a 90 degree phase through the power supply of Q2, and outputs it to the RF output terminal. The output signal is fed to the 90-degree phase feed section P1 of the low-pass radiation element 110. At this time, since the phase feeder P2 has a phase of 0 degrees, the two feeds have a phase difference of 90 degrees, and have a synthesized circular polarization to be copied to the space. The principle mentioned in the above circular polarization has explained the left rotating circular polarization, and the right rotating circular polarization is the power supply Q2, Q3 of the second phase switch 221b and the third phase switch 221c of the digital phase switch 221 + respectively. Operation is performed by applying 3V to obtain the polarization component of 270 degrees through the 90-degree and 180-degree synthesis, respectively.

Since the above-mentioned digital switch 221 is only an embodiment of one copying element, each digital phase switch 221 must be attached to a plurality of arranged copying elements.

[Microstrip Phase Controller]

FIG. 11 is an installation example of the microstrip phase controller shown in FIG. 8, in which five are installed corresponding to five radiating elements, and FIG. 12 is a view illustrating the microstrip phase controller assembly shown in FIG. 8. (a) is a top view of the Microstrip phase controller assembly and (b) is a side view of the Microstrip phase controller assembly. FIG. 13 is a diagram showing a dielectric of the microstrip phase controller shown in FIG. 12, wherein (a) is a fixed phase control dielectric and (b) is a moving phase control dielectric.

According to the present invention, the microstrip phase controller 230 generating various polarization components may include the microstrip phase control signal module 231, the phase driving module 232, and the PCB gear fixture 233, as shown in FIGS. 11 to 13. ), A PCB drive gear 234, a PCB support dielectric 235, a moving phase control dielectric 236, a fixed phase control dielectric 237, and a phase shield 238.

The fixed phase control dielectric 237 has a fixed phase control dielectric pattern 237a as shown in FIG. 14A, and the mobile phase control dielectric 236 has a mobile phase as shown in FIG. 14B. The control dielectric pattern 236a is formed. One side of the fixed phase control dielectric pattern has input lines L5 and L6 connected to the input connectors C5 and C6, and the other side output lines L1 to L4 connected to the output connectors C1 to C4. Formed. In addition, the input lines L5 and L6 and the output lines L1 to L4 are coupled through the pattern 236a of the moving phase control dielectric, and the phases vary according to the coupling position.

The microstrip phase controller 230 configured as described above changes the phase by moving the moving phase control dielectric 236 to the PCB driving gear 234. The moving phase control dielectric 236 and the fixed phase control dielectric (236) are referenced based on a reference point. According to the coupling position of 237, the phase is changed as shown in Table 3 below.

Feeder +45 degree polarization -45 degree polarization  Left circular polarization  Right circular polarization P1 0% FWD 100% REV 100% P2 0% FWD 100% REV 100% P3 0% FWD 100% REV 100% P4 0% FWD 100% REV 100%

FIG. 14 is a plan view of a dielectric shifted in accordance with the Microstrip phase shift in the present invention, and FIG. 15 is a side view of a dielectric shifted in accordance with the Microstrip phase shift in the present invention.

First, the 90-degree phase feed part P1 of the low pass radiation element 110 gives a phase of 0 degrees and is connected to the 90-degree phase feed connector C1. The 0 degree phase feed part P2 gives a 90 degree phase and is connected to the 0 degree phase feed connector C3. By combining these two paths, a phase difference of 90 degrees occurs and circular polarization is generated.

The following is the generation of +45 degree polarization.

14 and 15, the moving phase control dielectric 236 is currently referenced to zero degrees. At this time, the moving phase control dielectric 236 is driven in the left advancing direction while the fixed phase control dielectric 237 is always fixed. At this time, the zero degree phase feed line L3 of the fixed phase control dielectric 237 is always based on zero degree, and the phase change of the 90 degree phase feed line L1 is 270 degrees at zero degree phase. Currently, the moving phase control dielectric 236 has shifted 75% of the total movement efficiency, and the phase difference between the 90 degree phase feed line L1 and the 0 degree phase feed line L3 of the fixed phase control dielectric 237 is 270 degrees will occur. As mentioned above, since the 90 degree phase feed part P1 and the 0 degree phase feed part P2 have a 90 degree phase difference, the 90 degree phase feed part P1 and the 90 degree phase feed connector C1 are The dielectric phase generated by synthesizing to the 90 degree phase feed line L1 after passing through is 270 degrees. The dielectric phase generated by combining the 0 degree phase feed part P2 and the 0 degree phase feed connector C3 to the 0 degree phase feed line L3 is 90 degrees. At this time, since the 90-degree phase feed line L1 has an in-phase and the 0-degree phase feed line L3 has an inverse phase, each phase difference is 180 degrees out of phase. The specific radiation pattern of each low pass element 110 forms a normal radiation pattern due to a 180 degree phase difference. What has been described so far is addressed with respect to +45 degrees polarization.

In the case of -45 degree polarization, it is connected to the 90 degree phase feed connector C2 and the 90 degree phase feed line L2, and the 0 degree phase feed connector C4 and the 0 degree phase feed line L4 are connected. +45 degrees will behave the same as mentioned in polarization.

On the other hand, the microstrip phase controller driving principle is as follows.

The moving phase control dielectric 236 is coupled to the PCB gear holder 233, and the PCB gear holder 233c rotates in engagement with the PCB drive gear 234, and the moving phase control dielectric 236 is rotated by its rotation principle. Will be activated. The microstrip phase control module 231 controls the movement of the phase angle, and the microstrip phase drive module 232 serves to control the motor of the PCB driving gear 234.

16 is a modified example of the multi-band multipolar polarization variable antenna for mobile communication according to the present invention. Referring to FIG. 16, in the modified example, a shape similar to the overall configuration of the multipolarization variable antenna shown in FIG. 1 or an radiant element is illustrated in an octagonal shape. The radiation element and the parasitic element are simultaneously designed in an octagonal shape to obtain characteristics similar to those of the previous embodiment in pattern matching or impedance of a beam.

In the above, the present invention has been described with reference to the embodiments illustrated in the drawings, and it will be understood by those skilled in the art that other embodiments, such as various forms, configurations, and modifications, may be equivalent.

12: cable dielectric 14: impedance stub
16: money cable 20: radiator support
102: reflector 110: low-band radiating element
111: primary radiation element 112: parasitic element
P2, P4: 0 degree phase feed P1, P3: 90 degree phase feed
120: high band radiation element 202: low pass filter
204: high force filter 206: low-pass phase shifter
208: high-pass phase shifter 210: power divider
220: digital switch 230: microstrip phase controller
240: fixed cable feeder 250-1 to 250-n: polarization component generating unit

Claims (5)

A plurality of radiating elements formed in a circular shape and arranged vertically in multiple stages;
A plurality of polarization component generators for generating a predetermined polarization component and providing the radiation elements to the radiation elements so that the radiation elements radiate vertical polarization, ± 45 degree polarization or circular polarization; And
And a power divider for distributing a feed signal to the polarization component generator. The method of claim 1, wherein the plurality of radiating elements
Divided into a low band radiating element and a high band radiating element,
The low band radiation element is composed of a primary radiation element of a disc shape protruding on the front surface of the reflector plate, a circular parasitic element protruding on the front surface of the primary radiation element to function as a waveguide,
And a spacing between the primary radiating element and the parasitic element is 0.1λ to 0.5λ. The method of claim 1, wherein the polarization component generating unit
A multi-band multipolar polarization variable antenna for mobile communication, characterized in that it is implemented by any one of a digital switch, a microstrip phase controller and a fixed cable feeder. The method of claim 3, wherein the digital switch
Multi-band multi-polarization variable antenna for mobile communication, characterized in that consisting of 3-bit FET. 4. The microstrip phase controller of claim 3, wherein the microstrip phase controller
A fixed phase control dielectric having a fixed phase control dielectric pattern formed thereon and a moving phase control dielectric having a moving phase controlled dielectric pattern formed thereon;
Input lines L5 and L6 connected to the input connectors C5 and C6 are formed at one side of the fixed phase control dielectric pattern, and output lines L1 to L4 connected to the output connectors C1 to C4 at the other side. And the input lines L5 and L6 and the output lines L1 to L4 are coupled through the pattern 236a of the mobile phase control dielectric, and the phases vary according to the coupling position. Multipolarized Variable Antenna.

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