KR101437646B1 - Antenna for simultaneously measuring broadband vertical/horizontal polarization - Google Patents

Abstract

The present invention relates to an antenna for simultaneously measuring the vertical/horizontal polarization, which can simultaneously measure the vertical/horizontal polarization in order to be able to reduce the measurement time and equipment costs in EMC measurement. Therefore, the present invention is configured to simultaneously measure horizontal polarization components and vertical polarization components by having multiple vertical antennas and horizontal antennas connected to each other on a support stand to have a phase difference of 90°.

Description

Antenna for simultaneous measuring broadband vertical / horizontal polarization < RTI ID = 0.0 >

The present invention relates to a broadband vertical / horizontal simultaneous measurement antenna capable of simultaneously measuring vertical and horizontal polarizations in order to reduce measurement time and facility cost in EMC measurement.

The most time consuming EMI measurement items are Radiated-Emission tests, which are radiated to free space. Biconical, log-periodic, bi-log, etc. are used for measurement antennas.

These measurement antennas measure vertically polarized waves and horizontal polarized waves emitted from the manufactured antenna separately for each frequency, and select a higher value among the measured values.

There have been many efforts to reduce the measurement time in these existing systems. For example, a two-pole system for measuring vertical and horizontal polarization using two receivers and antennas is being used.

However, in the conventional method, since two receivers and antennas are used, expensive equipment and facilities must be charged twice. In addition, there is a problem in that time loss is large by separately measuring horizontal polarization after measuring vertical polarization.

In order to solve the above problems, it is an object of the present invention to provide a broadband vertical / horizontal simultaneous measurement antenna that minimizes both cost and time loss by simultaneously measuring vertical and horizontal polarization in a 1 Pole system.

In order to achieve the above object, the present invention provides a broadband vertical / horizontal simultaneous measurement antenna comprising: a plurality of vertical antennas and a horizontal antenna connected to a support so as to have a phase difference of 90 degrees with respect to each other, .

In the present invention, since the vertical and horizontal polarizations are simultaneously measured, it is not necessary to switch the measurement antennas in the horizontal mode for measuring the horizontal polarization and the vertical mode for measuring the vertical polarization, respectively, as in the conventional method, Two receivers and two antennas are not required to measure vertical and horizontal polarization, which is very effective for cost reduction.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a whole system diagram of a broadband vertical / horizontal simultaneous measurement antenna according to the present invention; FIG.
2 is a reflection loss graph of the present invention.
3 is a graph showing the standing wave ratio graph of the present invention.
4 is a connection diagram of the balun.
5 is a radiation pattern for each frequency.
6 is a frequency-based isolation diagram.
7 is a view showing a structure of a broadband vertical / horizontal simultaneous measurement antenna according to the present invention.
8A is a graph showing the return loss when the support has a tapered shape.
8B is a graph showing the return loss when the support is not tapered.
9A is a graph showing the standing wave ratio when the support has a tapered shape.
9B is a graph showing the standing wave ratio when the support is not tapered.
10 is a graph showing a standing wave ratio of a horizontal antenna.
11 is a graph showing a standing wave ratio of a vertical antenna.
12 is a graph showing the standing wave ratio of horizontal / vertical simultaneous measurement.
13 is a diagram showing a horizontal component measurement configuration of the reference antenna.
14 is a horizontal component measurement graph of the reference antenna.
FIG. 15 is a diagram showing the reception characteristic measurement of the measurement antenna according to the present invention. FIG.
FIG. 16 is a graph showing vertical characteristics of a measurement antenna according to the present invention. FIG.
17 is a graph showing horizontal characteristics of a measurement antenna according to the present invention.
FIG. 18 is a graph showing the horizontal and vertical characteristics of the measurement antenna according to the present invention. FIG.
FIG. 19 is a graph of horizontal / vertical simultaneous measurement characteristics of a measurement antenna according to the present invention. FIG.
FIG. 20 is a graph showing the horizontal and vertical (-3 dB) simultaneous measurement characteristics of the measurement antenna according to the present invention. FIG.
FIG. 21 is a graph showing horizontal and vertical (-3 dB) simultaneous measurement characteristics of the measurement antenna according to the present invention. FIG.
22 is a diagram showing a horizontal component measurement by a reference antenna (Combo Generator).
23 is a diagram showing a vertical component measurement by a reference antenna (Combo Generator).
FIG. 24 is a diagram illustrating a reception characteristic measurement (Combo Generator) of a measurement antenna according to the present invention. FIG.
25 is a graph of a reception characteristic measurement using a Combo Generator.
26 is a measurement graph in which a splitter loss value is corrected;
27 is a graph of splitter transmission loss.

The broadband vertical / horizontal simultaneous measurement antenna of the present invention thus configured will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a measuring antenna proposed by the present invention. Two Bi-Log measuring antennas 100 and 200 are designed and connected to a vertical and a horizontal portion at right angles to one support. ) And input to the instrument.

The reflection loss measured after fabrication almost coincided with the simulation value, and the reception characteristics were measured by comparing with the conventional wideband antenna.

In the present invention, if the vertical and horizontal components received by the broadband measurement antennas 100 and 200 are measured at the same time, the values input to the meter are summed to show a +3 dB effect.

It is experimentally confirmed that when one of the vertical and horizontal components falls to less than half (-3 dB), the value measured by the meter is measured to be about +2 dB at a large value of vertical and horizontal.

In addition, when the vertical and horizontal components differ by more than 10 dB from each other, it is experimentally confirmed that the measured value is almost the same as the vertical and horizontal large values.

1. Theoretical background

As described above, since the measurement antennas 100 and 200 of the present invention simultaneously measure the vertical and horizontal components and are added together through the splitter 300, a mathematical analysis of the resultant values is required in the process, And to verify its effectiveness by comparing the measured reception characteristics.

Generally, the power received at the receiving antenna is given by Equation (1).

Therefore, the received power of the horizontal component is given by Equation (2), and the received power of the vertical component is given by Equation (3).

Here, if the horizontal component and the vertical component are the same, it is given by Equation (4).

Therefore, the combined received power is given by Equation (5).

Here, if the horizontal component P _H or the vertical component P _V is divided into Equation (5), Equation (6) is given.

That is, the combined received power is twice the horizontal component and twice the vertical component.

Taking power algebra on both sides of Equation (6) gives Equation (7).

That is, when the vertical / horizontal components are the same in the measurement antennas 100 and 200 of the present invention, these synthesized components are measured to have a value of + 3dB on a single measurement.

If either the horizontal component or the vertical component is less than half of the other components (-3 dB), the combined received power is expressed by Equation 8, and expressed by the power algebraic function,

That is, in this case, it means that a value of +1.76 dB is measured to a larger value.

In practice, the vertical and horizontal components of a sample are more than 10 dB apart.

Therefore, the measurement antennas 100 and 200 of the present invention are designed and manufactured based on the above theory, and the reception characteristics thereof are measured to verify that the resultant values match the above-mentioned theoretical values.

2. Design and production

2-1 Setting the Frequency Range

In the EMC measurement, Bi-Log was set to 30 MHz ~ 1.6 GHz considering the physical size and the like, considering that the most frequently used frequency band is 30 MHz to 1 GHz in the Radiated-Emission test for measuring the electromagnetic wave radiated into free space ( Biconical 30 to 200 MHz, logarithmic frequency 200 MHz to 1.6 GHz).

2-2 Antenna reflection loss factor (S ₁₁ ) And standing wave ratio (SWR)

The reflection loss was set to be equal to or less than -10 dB in the horizontal and vertical portions.

This means that more than 90% of the feed power is transmitted, and is a general numerical value for antenna design and evaluation.

FIG. 2 and FIG. 3 are graphs of reflection losses and corresponding standing wave ratios of the antennas 100 and 200 designed by the overall antenna diagram of FIG.

At 1.3 GHz and above, the lack of a mesh is not accurate.

Here, the band below 200MHz is a region where a balun (400,500) is used for impedance matching with a feeder line to a biconical antenna region.

However, it is difficult to analyze the balun in the CST simulation program. In fact, the balun is installed to compensate.

2-3 Balun Design and Impedance Matching

In the configuration of the antenna, the angle of refraction of the cone of the biconical part was 38 ° considering the influence of interference and the receiving area, and the input impedance was 200Ω.

Therefore, a 4: 1 ferrite core balun was fabricated and inserted to match the feed line.

The logarithmic periodic section was matched without baluns to 50 Ω.

Table 1 and Table 2 and Figure 4 are the specifications and wiring diagram of the designed balun.

Electrical Specification No. Item Contents Remarks One Operating frequency 30 to 550 MHz Insertion loss within 3dB Frequency 2 Impedance conversion ratio 4: 1 3

Insertion loss

1 dB: 30 to 150 MHz

2 dB: 30 to 480 MHz 3 dB: 30 to 550 MHz

Mechanical Specification No. Item Contents Remarks One



About Pin



Pin 1: Unbalance



Pin 2: Unbalance Pin 3: balance Pin 4: Not use Pin 5: balance 2 Size [mm] 14 x 13.7 x 8.3 Core inside: diameter 3.8

2-4 Radiation pattern by frequency

5 shows radiation patterns for respective frequencies on a two-dimensional plane. First, frequencies from 30 MHz to 100 MHz are due to biconical antennas, and the electric field shows an even pattern on the XZ plane. Half Power Beam Width (HPBW) showed a distribution from 88 ° to 71 °.

The magnetic field pattern is omnidirectional (Omni-Directional) similar to the loop antenna on the YZ plane.

The frequency from 400 MHz to 1,600 MHz is due to the logarithmic periodic antenna. The half power angle of the electric field pattern is in the range of 43 ° to 63 °, and the magnetic field has a distribution of 87 ° to 107 °.

2-5 Isolation Diagram

6 shows the isolation between the horizontal antenna and the vertical antenna according to frequency and shows a maximum of 30 dB at a minimum of 13 dB.

2-6 Structure of Measurement Antenna

FIG. 7 is a view showing the structure of the measurement antennas 100 and 200 according to the present invention. FIG. 7 is a view showing the structure of the measurement antennas 100 and 200 according to the present invention. (200) are connected to each other while maintaining a predetermined interval or a specific interval in the longitudinal direction.

That is, a plurality of horizontal antennas 100 are installed on both sides in the horizontal direction around the support table 600, and a plurality of vertical antennas 200 are installed on both sides in the vertical direction.

The support platform 600 is divided into four supports 610, 620, 630 and 640 for installing the horizontal antenna 100 and the vertical antenna 200 installed in four directions, and the first support 610 and the second support 610, which are two horizontal supports, The support 620 and the third support 630 and the fourth support 640 which are two vertical supports are spaced apart from each other by the spacers 680 and 690. The plurality of horizontal antennas 610, (100) and a vertical antenna (200).

That is, the horizontal antenna 100 is connected to the first support 610 and the second support 620 in opposite directions, and the second support 630 and the fourth support 640 are connected to each other in the opposite direction The vertical antenna 200 is connected.

At this time, the support rods 610, 620, 630, and 640 have a tapered shape so as to be narrowed toward the tip, and the first and second supports 610 and 620, which are horizontal supports, And the third support 630 and the fourth support 640, which are vertical supports, are electrically connected by the second conductor 660 in the form of a metal plate.

In other words, the first conductor 650 and the second conductor 660 are crossed in a '+' shape, and an insulator 670 is inserted between the first conductor 650 and the second conductor 660 so that the first conductor 650 and the second conductor 660 Do not connect them electrically.

A cap 601 is placed on the tip of the support 600 so that the first conductor 650 and the second conductor 660 are not exposed to the outside.

640, 640, and 640 are fixed to the rear ends of the support rods 610, 620, 630, and 640, respectively, and four cones 800 are mounted on both sides in the horizontal and vertical directions.

At this time, the angle of refraction of the cone 800 was set to 38 degrees in consideration of the influence of interference and the receiving area, and the input impedance was set to 200 OMEGA.

1, the baluns 400 and 500 and the splitter 300 are installed inside the fixing part 700. The splitter 300 splits the horizontal polarization components received from the horizontal antenna 100 and the vertical antenna 200 The vertical polarization component is input, and the vertical polarization component is summed and output, and an external instrument measures this.

610, 620, 630, and 640 are formed in a tapered shape having a narrower width toward the tip, the reflection loss is less than that of a straight support having the same width, and the standing wave ratio can be stably obtained.

FIG. 8A is a graph showing reflection loss measured with the support rods 610, 620, 630 and 640 being tapered as in the present invention, and FIG. 8B is a graph showing the reflection loss of a straight support having the same width.

As shown in FIG. 8B, the graph of FIG. 8A shows low reflection loss.

9A is a graph showing the standing wave ratio of the tapered supports 610, 620, 630 and 640, and FIG. 9B is a graph showing the standing wave ratio of the straight support. FIG. 9A shows that the standing wave ratio is lower than the standing wave ratio of FIG.

2-7 Return loss of antenna measured after manufacturing (S ₁₁ , SWR)

10 is a standing wave ratio of the input port of the horizontal antenna 100, which is 1.2 or less on average excluding a specific frequency, and transmits 90% or more of the feed power.

11 that the standing wave ratio of the biconical part of the vertical antenna 200 is somewhat higher than that of the horizontal part of FIG. 7 because the characteristics of the manufactured ferrite core balun are not uniform.

FIG. 12 is a standing wave ratio measured after coupling the vertical and horizontal by the splitter 300, and it can be seen that the loss of the feed power is remarkably reduced.

3. Measurement of reception characteristics

3-1 Measuring the reception characteristics of the reference antenna

In order to verify the reception characteristics of the measurement antennas 100 and 200 of the present invention, the characteristics of the conventional verified wideband antenna when the vertical and horizontal components are simultaneously received are measured, and then the measurement antennas 100 and 200, And to compare and verify the reception characteristics.

13 is a horizontal measurement configuration diagram of the reference antenna.

The experiment in FIG. 13 was carried out in the 3 m semi-anechoic chamber, and in consideration of the same EUT, one transmitter 30 divided by 1/2 was sent to the vertical / horizontal transmitting antennas 10 and 20.

In order to reduce the influence of the ground reflection wave, a 2m × 2m absorber was installed at the bottom of the ground.

The height of the antenna was 1.6 m for both the transmitting and receiving antennas 10, 20 and 40, the distance between the transmitting and receiving antennas was 3 m, and the distance between the vertical and horizontal transmitting antennas 10 and 20 was 2 m.

All three transmit and receive antennas are the same as those used by Schwarzbeck's VULB 9168, with a usable frequency range of 30 MHz to 1.5 GHz.

The transmitter 30 and the receiver 50 were Rohde & Schwarz's ZNB Vector Network Analyzer.

The operating frequency band was 9KHz to 6GHz, and the transmission power was 10dBm.

15, the transmission unit 30 of the network analyzer removes the connection of the vertical transmission antenna 10, connects only the horizontal antenna 20, and measures the transmission loss S ₂₁ between the transmission and reception antennas (30 MHz to 1.6 GHz).

Then, both the vertical and horizontal transmission antennas 10 and 20 are connected, and the transmission loss S ₂₁ between the transmission antennas 10 and 20 and the reception antenna 40 is measured.

14 is a measurement graph.

In FIG. 14, the red graph at the upper part is the measured transmission loss (S ₂₁ ) when only the horizontal transmission antenna 20 is connected. And a transmission loss between the vertical and horizontal transmission antennas 10 and 20 and the horizontal reception antenna 40 when the blue portion below is transmitted in both vertical and horizontal directions.

As shown in FIG. 14, a difference between a measurement value when the signal is transmitted only to the horizontal transmission antenna 20 and a measurement value when the signals are transmitted by being divided by 1/2 into the vertical and horizontal transmission antennas 10 and 20, respectively, There is a difference. This is a natural result because the transmission value is half (-3dB).

There are some inconsistencies in the 30 MHz band and the 1.4 GHz band in the front part of the graph. This is inferred from the fact that a large number of vertical components are detected in the bi-log portion and the corresponding band of the antenna, GHz and the characteristics of the absorber.

In this experiment, it is confirmed that inter-frequency interference occurs when the vertical / horizontal components are received by the receiving antenna 40 at the same value, and that the nodalities (-3 dB) . Similar results were obtained in the vertical characteristics test.

3-2 Measurement of Reception Characteristics of Antenna According to the Present Invention

3-2-1 Measurement of vertical component

In this experiment, it is intended to specify a reception value when transmitting only to the vertical antenna 10.

15, the reference antennas shown in FIG. 13 are removed, and the measurement antennas 100 and 200 of the present invention are attached thereto, and attenuators 11 and 21 are provided on both sides of the horizontal and vertical transmission antennas 10 and 20 Respectively. Then, the output of the Network Analyzer was set to 13 dBm, and then the attenuator 11 of the vertical side was adjusted to -3 dBm.

The feed line of the horizontal transmission antenna 20 is cut off.

As a result, only 10 dBm of power was input to the vertical transmission antenna 10.

Others are the same as Section 3-1.

Experiments were conducted to investigate the transmission loss S ₂₁ between the transmission antennas 10 and 20 and the measurement antennas 100 and 200 according to the present invention while shielding the feed line of the horizontal transmission antenna 20 and transmitting only to the vertical transmission antenna 10 Respectively.

FIG. 16 is a measurement graph, in which only the vertical blue component is measured.

3-2-2 Horizontal component measurement

Similarly, in FIG. 15, the feed line of the vertical transmission antenna 10 is cut off, the output of the Network Analyzer is set to 13 dBm, and the horizontal attenuator 21 is adjusted to -3 dBm.

A power of 10 dBm was inputted only to the horizontal transmission antenna 20 as well.

Experiments were performed to measure the transmission loss S ₂₁ between the horizontal transmission antenna 20 and the measurement antennas 100 and 200 while shielding the feed line of the vertical transmission antenna 10 and transmitting only to the horizontal transmission antenna 20.

Fig. 17 is a measurement graph. When only a horizontal component exists, only the upper component of the blue graph is measured.

3-2-3 Simultaneous measurement of vertical / horizontal components

In Fig. 18, the red portion is the horizontal component (H) and the blue portion is the vertical component (V). That is, when the vertical and horizontal components coexist, the conventional method takes a high value by measuring each of the horizontal and vertical components.

As a result, only the values of the high graph are selected and recorded as the measured values.

Therefore, when measuring vertical / horizontal components at the same time, it is necessary to match a high value among the graphs of the values.

The graph of FIG. 19 is obtained by measuring the transmission loss (S ₂₁ ) between the transmission antennas 10 and 20 and the measurement antennas 100 and 200 by simultaneously connecting the vertical and horizontal transmission antennas 10 and 20.

In FIG. 19, the red portion is a vertical component, the shallow blue is a horizontal component, and the blue portion is a vertical / horizontal (H / V) simultaneous measurement graph. The measurement conditions were such that the output of the Network Analyzer was set to 13 dBm, and the two attenuators 11 and 21 of the horizontal and vertical transmitting antennas 10 and 20 were all set to 0 dB.

That is, 10 dBm power was supplied to both the vertical and horizontal transmission antennas 10 and 20.

Therefore, since three graphs including the vertical component measurement graph, the horizontal component measurement graph and the vertical / horizontal component measurement graph are fed at the same 10 dBm, it can be seen that the reception conditions of the preceding mathematical simulations 6 and 7 are satisfied.

The resultant value in FIG. 20 was about 4 to 5 dB. It can be seen that the reception conditions of Equations (6) and (8) are satisfied.

As shown in FIG. 20, the effect of +4 ~ 5dB was obtained at the frequencies where the two vertical and horizontal graph values coincide with each other. And, at the frequencies where the vertical and horizontal graph values show a difference of about 10dB, the simultaneous measurement value is almost equal to the high value of the two graphs.

That is, when the vertical and horizontal components of the same frequency differ from each other by more than 10 dB, it means that only one of the two components is measured at the time of simultaneous vertical / horizontal measurement by the measurement antennas 100 and 200 of the present invention. This is a very good result considering that the difference between the vertical and horizontal components at the same frequency is usually more than 10dB in actual measurement.

FIG. 21 is a graph showing a measurement result when the vertical component is fed at a half of -3 dB.

In the experiment, the output of the network analyzer was set to 13 dBm, the horizontal attenuator (21) was adjusted to 0 dB, and the vertical attenuator (11) was adjusted to -3 dB. Thus, the vertical transmission antenna 10 was fed with 7 dBm, which is half of the horizontal transmission antenna 20.

Therefore, it can be seen that the reception conditions of the above Equations (8) and (9) are satisfied.

The resultant value in Fig. 20 was about 2 to 3 dB.

Which is somewhat higher than the theoretical value of 1.76 dB of Equations 8 and 9.

On the contrary, the same result was obtained even when the horizontal component was fed at half of the vertical component, and Fig. 21 is a measurement graph.

3-3 Measurement of reception characteristics using Combo Generator

In this experiment, we used the Combo Generator (CNE Ⅲ, 9kHz ~ 1Ghz) instead of the EUT on the assumption of actual measurement. The EMI test receiver, an ESU model of Rohde & Schwarz Co., To 8 GHz, and the other conditions are the same as in the previous experiment.

In this experiment, the actual field strength was measured instead of the transmission loss, and FIGS. 22 to 24 are measurement configuration diagrams.

As shown in FIG. 22, the reference antenna 40 is installed horizontally on the receiving side and the transmitter side is operated by placing the Combo Generator 70 on a styrofoam table 80 cm high from the ground.

In consideration of the actual measurement conditions, no groundwater absorbing material was laid on the floor. Then, the electric field intensity at that time was measured.

Thereafter, similarly, the receiving antenna 40 was vertically switched as shown in Fig. 23, and the electric field intensity at that time was measured.

Finally, as shown in FIG. 24, the vertical and horizontal components were measured simultaneously after replacing with the measurement antennas 100 and 200 of the present invention.

25 is a measurement graph in which the blue portion above is the vertical component by the reference antenna and the black portion below is the horizontal component measurement graph. And the green portion in the middle is a component measured simultaneously by the measurement antennas 100 and 200 of the present invention.

As shown in FIG. 25, the vertical and horizontal components show a difference of more than 10 dB over the entire frequency band.

Therefore, only the vertical component is detected without the horizontal component, and the vertical component of the reference antenna is approximately 6dB in the entire frequency band.

This is the same as the transmission loss (S ₂₁ ) value of the splitter 300 used for manufacturing the measurement antennas 100 and 200 of the present invention. That is, if the transmission loss (S ₂₁ ) value of 6 dB of the splitter 300 is corrected, it means that it is equal to the vertical component measurement value of the reference antenna.

It is assumed that the difference of 6 dB or less in some specific frequency bands is related to the inherent antenna gain of the measurement antennas 100 and 200 of the present invention.

Therefore, if the measurement antennas 100 and 200 of the present invention are accurately calibrated and the gain is calculated and corrected, it is expected that the measurement antenna 100 and 200 will exactly coincide with the horizontal component graph of the reference antenna 40.

26 shows the result of measurement after correcting the loss value of 6 dB of the splitter 300. Fig.

Figure 27 is a eunneun transmission loss (S ₂₁₎ Grafton of the splitter 300 is used to measure the antenna (100,200) produced according to the present invention.

4. Conclusion

As described above, the measurement antennas 100 and 200 of the present invention have the following results in simultaneous measurement in the vertical and horizontal directions.

1. When the vertical and horizontal components are incident on the measurement antenna with the same value, the measured value is measured approximately 4 to 5 dB higher than the measured value of each vertical or horizontal component. This is somewhat higher than the theoretical value of 3 dB mentioned above.

2. When one of the vertical and horizontal components incident on the measurement antenna falls to less than half (-3dB), the measured value is measured to be 2 to 3dB higher than the larger value of vertical and horizontal. This is also somewhat higher than the theoretical value 1.76dB given above.

3. If the vertical and horizontal components incident on the measuring antenna differ by more than 10dB from each other, the measured value almost coincides with the large value of vertical and horizontal.

As a result, in the simultaneous measurement of vertical and horizontal using the measuring antenna according to the present invention, the measured value is approximately 4 to 5 dB higher than the value measured separately for the vertical and horizontal components or worst case.

Therefore, in any case, errors that exceed the limits regulated by IEC CISPR can not occur. However, only the vertical component and the horizontal component are not distinguished. But this is not a big deal.

This result seems to be valid for other antennas such as loop antennas and horn antennas.

100: horizontal antenna 200: vertical antenna
300: splitter 400,500: balun
600: support 700:
800: Cone

Claims (8)

A plurality of vertical antennas and a horizontal antenna are connected to the support so as to have a phase difference of 90 ° with respect to each other, and simultaneously measure the horizontal polarization component and the vertical polarization component,
Wherein a rear end of the support is mounted and fixed to a fixing part, and a cone is mounted to the fixing part in a horizontal and vertical direction.
The wideband vertical / horizontal simultaneous measurement antenna according to claim 1, wherein the vertical polarization component and the horizontal polarization component received by the vertical antenna and the horizontal antenna are respectively summed through a splitter.
2. The broadband vertical / horizontal simultaneous measurement antenna according to claim 1, wherein the support has a tapered shape with a width becoming narrower toward the tip.
[2] The apparatus of claim 1, wherein the support member is divided into four support members and spaced apart from each other. Horizontal antennas are connected to the two horizontal support members in opposite directions. Vertical antennas Wherein the first and second antennas are connected to each other.
The broadband vertical / horizontal simultaneous measurement antenna according to claim 4, wherein each of the support rods has a tapered shape that becomes narrower toward the tip.
The connector according to claim 4, further comprising: a first conductor mounted on the tip of the two horizontal supports to electrically connect the horizontal supports, and a second conductor mounted on the tip of the two vertical supports to electrically connect the vertical supports Wherein the antenna comprises:
delete The wideband vertical / horizontal simultaneous measurement antenna according to claim 1, wherein a splitter is incorporated in the fixing portion.

Images