JP2017073736A - Parallel distribution feed line using multilayer substrate and collinear antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a parallel distribution feed line using a multilayer substrate which allows for enhancement of mass productivity of antenna, without requiring complicated routing or built-in of a coaxial cable as the feed line, and to provide a collinear antenna.SOLUTION: Parallel distribution feeding of 4 distribution in 4 layer, and 8 distribution in 6 layers are possible, by repeating power distribution from a feeding section E to 2 layers of multilayer substrates 11a, 11b, ..., and from conductor through holes (first stage) 14a, (second stage) 14b1, 14b2, ... to strip conductor patterns (first state) 16a, (second state) 16b1, 16b2, ... A collinear antenna is constituted by adding a radiation element, formed by he strip line, to each supply termination Et1, Et2, ... subjected to parallel distribution feeding.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a parallel distribution feed line and a collinear antenna using a multilayer substrate.

  Conventionally, a parallel-feed omnidirectional collinear antenna has been used as an antenna for a mobile phone base station (see, for example, Patent Document 1).

  This parallel feeding type omnidirectional collinear antenna is configured to feed power to a plurality of radiating elements arrayed in multiple stages in parallel via a distributor. For example, in the case of a collinear antenna having 12 stages of radiating elements, a set of four collinear antennas that distribute and feed four radiating elements using three two distributors, and three sets of the four collinear antennas are arranged in parallel. The four-element collinear antennas are arranged side by side and are fed in parallel from the feed terminal via the three distributors. Coaxial cables are used as feed lines from the three distributors to the four-element collinear antennas and between the two distributors in the four-element collinear antennas and to the radiating elements.

  The direction of the beam tilt of the vertical plane directivity is controlled by feeding the coaxial cables from the feeding terminal to each of the four-element collinear antennas with different lengths and adding a phase difference.

Japanese Patent No. 4452081

  The conventional parallel-feed omnidirectional collinear antenna requires a number of coaxial cables corresponding to a plurality of radiating elements, and in particular, when the number of radiating elements is large, a large number of coaxial cables are incorporated to form a single antenna. There is a problem that the production time per hit becomes very long.

  Further, in order to give a phase difference to each radiating element, it is necessary to use a coaxial cable longer than the distance between the radiating elements, and the coaxial cable is often drawn in a complicated manner. In particular, in the case of an antenna having a small diameter, the distance between the radiating element and the coaxial cable becomes extremely short, and the routing of the coaxial cable affects the electrical characteristics. For this reason, there is also a problem that mass productivity deteriorates because it is necessary to route the coaxial cable in consideration of the influence on the electrical characteristics.

  The present invention has been made in view of such a problem, and it is not necessary to perform complicated routing and incorporation of a coaxial cable as a feed line, and parallel distribution using a multilayer substrate that can improve the mass productivity of an antenna. An object is to provide a feed line and a collinear antenna.

  The parallel distribution feed line using the multilayer substrate according to the present invention includes a multilayer substrate in which a plurality of dielectric substrates are stacked in multiple stages, and a conductor through penetrating the lower substrate provided from the lower layer side to the upper layer side of the multilayer substrate. A strip line formed between the hole and the upper end portion of the conductor through hole penetrating the lower layer substrate and sandwiched between the upper layer substrate of the substrate and the strip line connected to a plurality of end portions of the strip line A plurality of conductor through-holes, which are formed by repeating a plurality of conductor through-holes penetrating the upper layer substrate across the line, and a plurality of conductor through holes penetrating the lower-layer substrate through the feeding portion and the uppermost substrate And a distribution feed line having a hole as a plurality of feed terminal portions.

  The collinear antenna according to the present invention further includes stripline radiating elements connected to a plurality of feed terminal portions of a parallel distribution feedline using the multilayer substrate and formed on the uppermost substrate surface. It is a feature.

  According to the present invention, it is possible to improve the mass productivity of an antenna without the need for complicated routing and incorporation of a coaxial cable as a feed line.

The figure which shows the cross-sectional structure of the parallel distribution feed line 10 using the multilayer board | substrate which concerns on embodiment of this invention. The figure which shows the aa 'line cross-section structure of the parallel distribution feed line 10 using the said multilayer substrate. Three layers of ground conductor patterns 12a, 12b, 12c and strip conductor patterns 16a, 16b1, 16b2 insulatively sandwiched between the various conductor patterns 12a, 12b, 12c in the parallel distribution feed line 10 using the multilayer substrate. The figure expand | deployed and shown on a plane. In the parallel distribution power supply line 10 using the multilayer substrate, a distributed power supply system is formed by the conductor through holes 14a, 14b1, 14b2 and the strip conductor patterns 16a, 16b1, 16b2 of the three layers of the ground conductor patterns 12a, 12b, 12c. FIG. The figure which shows the cross-sectional structure of the 8-element collinear antenna 20 comprised using the parallel distribution feed line 10 using the said multilayer substrate as a feed system. Two-element type dipole radiating elements (upper elements) 19an... Formed on the surface of the radiating element substrate 17 of the uppermost layer of the eight-element collinear antenna 20 configured by using the parallel distribution feeder line 10 using the multilayer substrate as a feeding system. (Lower element) The top view which shows the pattern of 19bn .... FIG. 3 is a diagram showing a distributed feeding system from a feeding part E to each dipole radiating element 19an, 19bn as viewed obliquely in an 8-element collinear antenna 20 configured by using a parallel distributed feeding line 10 using the multilayer substrate as a feeding system. The figure which shows the vertical surface directivity V and the horizontal surface directivity H of a 900 MHz band (945 MHz) vertical polarization by the 8-element collinear antenna 20 using the said multilayer substrate. The figure which shows the vertical surface directivity V and the horizontal surface directivity H of a 3.5 GHz band (3,540 MHz) vertical polarization by the 8-element collinear antenna 20 using the said multilayer substrate. The figure which shows the cross-sectional structure of the 8-element symmetrical collinear antenna 30 using a multilayer substrate. The figure which shows the vertical surface directivity V and the horizontal surface directivity H of a 3.5 GHz band (3,540 MHz) vertical polarization by the 8-element symmetrical collinear antenna 30 using the said multilayer substrate. The figure which shows the distributed electric power feeding system from the electric power feeding part Eo to each dipole radiation element 19an, 19bn seen from diagonally in the 8-element symmetrical collinear antenna 30 using the said multilayer substrate. The figure which shows the cross-sectional structure of the 16 element symmetrical type collinear antenna 50 (electrical tilt 0 degree setting) using a multilayer substrate. The figure which shows the cross-sectional structure of 16 element symmetrical type collinear antenna 50T (electric tilt 6 degree setting) using a multilayer substrate. The figure which shows the distributed electric power feeding system from the electric power feeding part Eo to each dipole radiation element 19an, 19bn seen from diagonally in 16 element symmetrical type collinear antenna 50 (electrical tilt 0 degree setting) using the said multilayer substrate. The figure which shows the distributed electric power feeding system from the electric power feeding part Eo to each dipole radiating element 19an, 19bn seen from diagonally in 16 element symmetrical type collinear antenna 50T (electrical tilt 6 degree setting) using the said multilayer substrate. The figure which shows the vertical surface directivity V and the horizontal surface directivity H of a 3.5 GHz band (3,540 MHz) vertical polarization by the 16-element symmetrical collinear antenna 50 (electric tilt 0 degree setting) using the said multilayer substrate. The figure which shows the vertical surface directivity V and the horizontal surface directivity H of a 3.5 GHz band (3,540 MHz) vertical polarization by 16 element symmetrical type | mold collinear antenna 50T (electric tilt 6 degree setting) using the said multilayer substrate. The figure which shows the standing wave ratio characteristic of the 16 element symmetrical type collinear antenna 50 (electrical tilt 0 degree setting) using the said multilayer substrate.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a cross-sectional configuration of a parallel distribution feed line 10 using a multilayer substrate according to an embodiment of the present invention.

  FIG. 2 is a diagram showing a cross-sectional configuration along line aa ′ of the parallel distribution feed line 10 using the multilayer substrate.

  FIG. 3 shows strip conductor patterns 16a, 16b1 that are insulated and sandwiched between the three layers of ground conductor patterns 12a, 12b, 12c and the various conductor patterns 12a, 12b, 12c in the parallel distribution feed line 10 using the multilayer substrate. , 16b2 are developed on a plane.

  FIG. 4 is based on the conductor through holes 14a, 14b1, 14b2 and the strip conductor patterns 16a, 16b1, 16b2 of the three layers of the ground conductor patterns 12a, 12b, 12c in the parallel distribution feed line 10 using the multilayer substrate. It is a figure which shows a distributed electric power feeding system seeing from diagonally.

  The parallel distribution feed line 10 using this multilayer substrate shows a parallel 4-distribution feed line, and has dielectric substrates 11a to 11d stacked in four layers.

  In the four-layer dielectric substrates 11a to 11d, a ground conductor pattern 12a is provided on the lower surface of the first-layer substrate 11a, and a hole 13a for the feeding portion E is formed in the center of the ground conductor pattern 12a. .

  A conductor through hole (first stage) 14a having a diameter that does not contact the hole 13a from the center of the hole 13a is disposed so as to penetrate the first layer substrate 11a, and the first and second layer substrates 11a and 11b. It is electrically connected to an intermediate portion of the strip conductor pattern (first stage) 16a formed between them.

  Further, conductor through-holes (second stage) 14b1 and 14b2 electrically connected to both ends of the strip conductor pattern (first stage) 16a are disposed through the second and third-layer substrates 11b and 11c. Between the second and third layers 11b and 11c, a ground conductor pattern 12b having holes 13b1 and 13b2 that do not contact the conductor through holes (second stage) 14b1 and 14b2 is provided.

  Further, the conductor through-holes (second stage) 14b1 and 14b2 are electrically connected to the intermediate portions of the strip conductor patterns (second stage) 16b1 and 16b2 formed between the third and fourth layers of the substrates 11c and 11d. The four conductor through holes (third stage) 14c1, 14c2, 14c3, and 14c4 electrically connected to both ends of the strip conductor patterns (second stage) 16b1 and 16b2 are connected to the fourth layer. The substrate 11d is disposed through the substrate 11d.

  The ground conductor pattern is formed with holes 13c1, 13c2, 13c3, 13c4 that do not contact the four conductor through holes (third stage) 14c1, 14c2, 14c3, 14c4 on the upper surface of the fourth layer substrate 11d. 12c is provided, and the tips of the four conductor through-holes (third stage) 14c1 to 14c4 are configured as power supply terminal portions Et1 to Et4, respectively.

  That is, in the parallel distribution feed line 10 using the multi-layer substrate, the power fed from the feed part E corresponds to the connection part between the first-stage conductor through hole 14a and the strip conductor pattern 16a as the two distribution parts 15a. The strip conductor pattern (first stage) 16a is divided into two at both ends, and the connection parts between the second conductor through holes 14b1 and 14b2 and the strip conductor patterns 16b1 and 16b2 are defined as two distribution parts 15b1 and 15b2. The strip conductor patterns (second stage) 16b1 and 16b2 are divided into two at both ends.

  Therefore, according to the parallel distribution feed line 10, the conductor through holes (first stage) 14a, (second stage) 14b1, 14b2, two layers of the multilayer substrates 11a, 11b,. .. Is repeatedly distributed to the strip conductor pattern (first stage) 16a, (second stage) 16b1, 16b2,... Is possible.

  When the parallel distribution feed line 10 having the above configuration is used for an antenna for a mobile phone base station (900 MHz / 3.5 GHz), the thickness D of one layer of the dielectric substrates 11a, 11b,. For example, the width W is set to about a quarter wavelength (λ / 4) to a fifth wavelength (λ / 5).

  Further, the impedance matching of the parallel distribution feed line 10 having the above configuration is adjusted by the width of the two distribution portions 15a in each of the strip conductor patterns 16a, and is set to 100Ω, for example, in the strip line of the two distribution portions 15a.

  FIG. 5 is a diagram showing a cross-sectional configuration of an 8-element collinear antenna 20 configured using the parallel distribution feed line 10 using the multilayer substrate as a feed system.

  FIG. 6 shows two-element type dipole radiating elements (upper elements) formed on the surface of the radiating element substrate 17 of the uppermost layer of the eight-element collinear antenna 20 constructed by using the parallel distribution feed line 10 using the multilayer substrate as a feeding system. ) 19 an... (Lower element) 19 bn.

  FIG. 7 shows an oblique view of the distributed feed system from the feed section E to each of the dipole radiating elements 19an and 19bn in the 8-element collinear antenna 20 configured with the parallel distributed feed line 10 using the multilayer substrate as a feed system. FIG.

  The 8-element collinear antenna 20 is configured by superposing a radiating element substrate 17 on an upper layer of a 4-distributed parallel distribution feed line 10 using the multilayer substrate shown in FIGS.

  Four conductor through-holes (third stage) 14c1 to 14c4 penetrating through the fourth layer substrate 11d of the parallel distribution feed line 10 are further penetrated through the radiating element substrate 17 and distributed into four feed ends. Let it be portions Et1 to Et4.

  The two-element type dipole radiation formed as the microstrip line 18 on the upper surface of the radiation element substrate 17 in each of the power supply termination portions Et1 to Et4 by the four conductor through holes (third stage) 14c1 to 14c4. Elements (upper elements) 19 a 1, 19 a 2, 19 a 3, 19 a 4, 19 a 5, 19 a 6, 19 a 7, 19 a 8 are connected to the respective distributed power feeding sections 21. Parallel power feeding is performed by connecting the respective distributed power feeding portions 21 of the dipole radiating elements (lower elements) 19b1, 19b2, 19b3, 19b4, 19b5, 19b6, 19b7, 19b8 formed on the radiating element pattern (ground conductor pattern) 12c. A type eight-element collinear antenna 20 is formed.

  As a result, the power fed from the power feeding section E is divided into four through the parallel distribution power feed line 10 and then the eight dipole radiating elements 19a1 (19b1) to 19a8 (formed on the radiating element substrate 17). 19b8) is divided into 8 parts and fed to radiate radio waves.

  As shown in FIG. 6, the length L of the pair of dipole radiating elements 19an and 19bn formed on the upper and lower surfaces of the radiating element substrate 17 is set to a half wavelength (1 / λ), for example. The width (width of the radiating element substrate 17) W of the dipole radiating elements 19an and 19bn is set to, for example, about a quarter wavelength (λ / 4) to a fifth wavelength (λ / 5).

  FIG. 8 is a diagram showing vertical plane directivity V and horizontal plane directivity H of vertical polarization in the 900 MHz band (945 MHz) by the 8-element collinear antenna 20 using the multilayer substrate.

  FIG. 9 is a diagram showing vertical plane directivity V and horizontal plane directivity H of 3.5 GHz band (3,540 MHz) vertical polarization by the 8-element collinear antenna 20 using the multilayer substrate.

  As for the horizontal plane directivity H in each frequency band, as shown in FIG. 8, the horizontal plane deviation in the 900 MHz band can be omnidirectional within 1 dB, but as shown in FIG. 9, the horizontal plane in the 3.5 GHz band. The deviation is about 4.5 dB, and sufficient omnidirectionality cannot be obtained.

  This is because the wavelength in the 3.5 GHz band is shorter than the wavelength in the 900 MHz band, so that the multi-layered ground conductor patterns 12a, 12b,... Reflect the dipole radiating elements 19a1 (19b1) to 19a8 (19b8). It is thought that it will function as.

  Next, an 8-element symmetric collinear antenna 30 using a multilayer substrate capable of obtaining omnidirectionality in the horizontal plane directivity H in the 3.5 GHz band will be described.

  FIG. 10 is a diagram showing a cross-sectional configuration of an 8-element symmetric collinear antenna 30 using a multilayer substrate.

  FIG. 11 is a diagram showing a vertical plane directivity V and a horizontal plane directivity H of vertical polarization in the 3.5 GHz band (3,540 MHz) by the 8-element symmetric collinear antenna 30 using the multilayer substrate.

  FIG. 12 is a diagram showing a distributed feeding system from the feeding part Eo to each of the dipole radiating elements 19an and 19bn as viewed obliquely in the 8-element symmetric collinear antenna 30 using the multilayer substrate.

  The 8-element symmetric collinear antenna 30 is formed by combining two 8-element collinear antennas 20 shown in FIGS. 5 to 7 and integrating the feeding portions E of the antennas 20 facing each other.

  Specifically, the bottom surfaces of the two 8-element collinear antennas 20 with the feeding portion E are further layered by overlapping the base layer substrates 11Base and 11Base added to each other, and the conductor through-holes 14a and 14a are formed as described above. A two-distribution conductor through hole 22 is formed by penetrating through each base layer substrate 11Base and 11Base.

  The base layer substrates 11Base and 11Base and the respective conductor patterns 12a and 12a provided between the base layer substrates 11Base and 11Base and the first layer substrates 11a and 11a are formed by the 8-element symmetrical collinear antenna 30. One end side in the length direction, that is, one end side in the array direction of each dipole radiating element 19a1 (19b1) to 19a8 (19b8) is projected.

  The two distribution conductor through holes 22 are connected to one end of a power strip conductor pattern 23 formed between the base layer substrates 11Base and 11Base on one end side of the antenna 30, and the power supply strip conductor pattern. The other end of the base layer substrate 11Base is led out to a hole 13o formed in one ground conductor pattern 12a in the protruding portion of each base layer substrate 11Base by a conductor through hole 14o to feed the 8-element symmetrical collinear antenna 30. A portion Eo is formed.

  The impedance matching of the 8-element symmetric collinear antenna 30 is not only adjusted by the width of the two distribution portions 15a in each strip conductor pattern 16a formed between the multilayer substrates 11a and 11b and between 11c and 11d. Adjustment is also made according to the width of the feeding strip conductor pattern 23. Thereby, the radiation directivity of the antenna 30 is controlled.

  According to the 8-element symmetric collinear antenna 30, the influence of the multi-layered ground conductor patterns 12a, 12b,... On the dipole radiating elements 19a1 (19b1) to 19a8 (19b8) can be reduced. As shown in the figure, the horizontal plane deviation in the 3.5 GHz band can be reduced to about 1.5 dB so that omnidirectionality can be achieved.

  In the embodiment shown in FIGS. 5 to 12, the case of the 8-element collinear antenna 20 and the 8-element symmetric collinear antenna 30 in which the 8-element collinear antenna 20 is set as one set has been described. The collinear antenna configured by using the parallel distribution feed line using the multilayer substrate of the embodiment as a feed system is not limited to 8 elements (8 stages), and can be set to any number of elements (stages).

  FIG. 13A is a diagram showing a cross-sectional configuration of a 16-element symmetric collinear antenna 50 (electrical tilt 0 ° setting) using a multilayer substrate.

  FIG. 13B is a diagram showing a cross-sectional configuration of a 16-element symmetric collinear antenna 50T (electric tilt 6 ° setting) using a multilayer substrate.

  FIG. 14A is a diagram showing a distributed feeding system from a feeding part Eo to each dipole radiating element 19an, 19bn as viewed obliquely in a 16-element symmetric collinear antenna 50 (electrical tilt 0 ° setting) using the multilayer substrate. .

  FIG. 14B is a diagram showing a distributed feeding system from the feeding part Eo to each of the dipole radiating elements 19an and 19bn as viewed obliquely in a 16-element symmetrical collinear antenna 50T (electrical tilt 6 ° setting) using the multilayer substrate. .

  As shown in FIGS. 13A and 14A, the 16-element symmetric collinear antenna 50 (electrical tilt set to 0 °) is the same as the 8-element symmetric collinear antenna 30 shown in FIGS. The 16-element collinear antenna 40 is configured as a set of two in the same manner as configured as a set of two.

  The 16-element collinear antenna 40 has a multi-layered structure in which the fifth and sixth dielectric substrates 11e and 11f are layered on the upper layer of the parallel distribution feed line 10 using the multilayer substrate, and the four conductor through-holes are formed. Strip conductor patterns (third stage) 16c1 to 16c4 and the sixth layer are formed by sandwiching the four feed lines distributed by 14c1 to 14c4 (third stage) between the fifth and sixth layer substrates 11e and 11f. The eight conductor through-holes 14d1 to 14d8 penetrated through the substrate 11f are used as eight distribution feed lines.

  Then, the radiating element substrate 17 similar to the above is overlapped on the upper layer of the 8-distributed parallel distribution feed line to further increase the number of layers, and the eight conductor through holes 14d1 to 14d8 are used as the feed terminal portions Et1 to Et8, respectively. Power is supplied to the 16-element dipole radiating elements 19a1 (19b1) to 19a16 (19b16) formed in FIG.

  In a 16-element symmetric collinear antenna 50 (electric tilt set to 0 °) configured by combining two 16-element collinear antennas 40, the two distribution conductor through-holes (first stage) 22 (14a), (2 Step 2) 14b1 and 14b2, and (third step) 14c1 to 14c4 respectively corresponding strip conductor patterns (first step) 16a, (second step) 16b1, 16b2, and (third step) 16c1 to 16c4. Distribution positions (15a, 15b1, 15b2, 15c1 to 15c4) and feed terminal portions Et1 to the corresponding dipole radiating elements 19a1 (19b1) to 19a16 (19b16) from the conductor through holes (fourth stage) 14d1 to 14d8 The two distribution positions to be Et8 are the strip conductor patterns (first stage) 16a from the two distribution positions. (Second stage) 16b1, 16b2, (third stage) 16c1 to 16c4 and dipole radiating elements 19a1 (19b1) to 19a16 (19b16) are configured to have a length ratio of 1: 1 to both ends. Thus, the electric tilt is set to 0 °.

  On the other hand, as shown in FIGS. 13B and 14B, each of the two distribution positions is changed from each of the two distribution positions to each strip conductor pattern (first stage) 16a, (second stage) 16b1, 16b2, (three stages). Eye) Parallel distribution feed line 10T in which the phase difference is controlled by setting the ratio of the lengths of both ends of 16c1 to 16c4 and dipole radiating elements 19a1 (19b1) to 19a16 (19b16) to, for example, a constant multiple of 1: 2. By configuring as a 16-element collinear antenna 40T, a 16-element symmetric collinear antenna 50T set to an electrical tilt of 6 ° can be realized.

  In the 16-element symmetric collinear antenna 50T (electrical tilt 6 ° setting), the larger the ratio of the lengths of the two distribution positions to the distribution ends, the larger the phase difference and the deeper the electrical tilt angle. it can.

  FIG. 15 shows a vertical plane directivity V and a horizontal plane directivity H of 3.5 GHz band (3,540 MHz) vertical polarization by a 16-element symmetric collinear antenna 50 (electrical tilt 0 ° setting) using the multilayer substrate. FIG.

  FIG. 16 shows a vertical plane directivity V and a horizontal plane directivity H of 3.5 GHz band (3,540 MHz) vertical polarization by a 16-element symmetric collinear antenna 50T (electrical tilt 6 ° setting) using the multilayer substrate. FIG.

  In any case of the 16-element symmetric collinear antenna 50 (electrical tilt 0 ° setting) and 50T (electrical tilt 6 ° setting), the horizontal plane deviation is about 1 dB and omnidirectionality is obtained.

  FIG. 17 is a diagram showing a standing wave ratio characteristic of a 16-element symmetric collinear antenna 50 (electrical tilt 0 ° setting) using the multilayer substrate.

  The standing wave ratio of the 16-element symmetric collinear antenna 50 (electrical tilt set to 0 °) is 1.3 or less at 3480 to 3600 MHz, indicating good characteristics.

  Therefore, according to the collinear antennas 20, 30, 40, 50, and 50T configured by using the parallel distribution feed line 10 using the multilayer substrate having the above configuration as a feed system, the multilayer substrate 11a, 11b,... From the conductor through holes (first stage) 14a, (second stage) 14b1, 14b2,... To the strip conductor pattern (first stage) 16a, (second stage) 16b1, 16b2,. By repeating the power distribution of 2 distribution to ..., it becomes possible to perform parallel distribution power supply of 4 distributions in 4 layers and 8 distributions in 6 layers.

  For this reason, the mass productivity of the collinear antenna can be improved without the need for complicated routing and incorporation of a coaxial cable as a feed line.

  In the parallel distribution feed line 10 using the multilayer substrate of the embodiment and the collinear antennas 20, 30, 40, 50, and 50T configured using the parallel distribution feed line 10 as a feed system, the multilayer substrate (11Base, 11a, 11b,... (Including the radiating element substrate 17)) are all described as dielectric substrates. However, by using a foamed material substrate, a porous substrate, or a cross-linked polystyrene substrate as the dielectric substrate, the dielectric constant thereof can be obtained. Can be reduced, power supply loss can be reduced, and gain can be increased.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention when it is practiced. Further, each of the embodiments includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in each embodiment or some constituent elements are combined in different forms, the problems described in the column of the problem to be solved by the invention If the effects described in the column “Effects of the Invention” can be obtained, a configuration in which these constituent requirements are deleted or combined can be extracted as an invention.

DESCRIPTION OF SYMBOLS 10 ... Parallel distribution feed line using a multilayer substrate 11a, 11b, ... Dielectric substrate 11Base ... Dielectric substrate (base layer)
12a, 12b, ... Ground conductor patterns 13o, 13a, 13bn, 13cn, ... Holes (for passing through conductor through holes)
14o, 14a, 14bn, 14cn, ... Conductor through-holes 15a, 15bn, 15cn, ... 2 distribution parts 16a, 16bn, 16cn, ... Strip conductor pattern E ... Power feeding part Eo ... Power feeding part (symmetric type)
Et1, Et2,... Power feed termination 17 ... Radiation element substrate 18 ... Microstrip line 19an, ... Dipole radiation element (upper element)
19bn, ... Dipole radiating element (lower element)
DESCRIPTION OF SYMBOLS 20 ... 8-element collinear antenna 21 ... Distribution feed part 22 ... 2 distribution conductor through hole 23 ... Feed strip conductor pattern 30 ... 8-element symmetric collinear antenna 40 ... 16-element collinear antenna 50 ... 16-element symmetric collinear antenna (electricity) (Tilt 0 ° setting)
50T ... 16 element symmetric collinear antenna (electric tilt 6 ° setting)

Claims (2)

A multilayer substrate in which a plurality of dielectric substrates are stacked in multiple stages;
Provided from the lower layer side to the upper layer side of the multilayer substrate, between the conductor through hole that penetrates the lower layer substrate and the upper end portion of the conductor through hole that penetrates the lower layer substrate. It consists of a strip line formed between and a plurality of conductor through-holes that are connected to a plurality of ends of the strip line and penetrate the upper substrate sandwiching the strip line. A distributed feeder line having a plurality of conductor through holes penetrating through the uppermost substrate through a plurality of conductor through holes,
A parallel distribution feed line using a multi-layer substrate.   A strip line radiating element connected to a plurality of feed terminal portions of a parallel distribution feed line using the multilayer substrate according to claim 1 and formed on the substrate surface of the uppermost layer is further provided. A collinear antenna.