CN112787085A - Multi-frequency antenna, radiation unit assembly, radiation unit mounting structure and fixing seat - Google Patents

Abstract

The invention provides a multi-frequency antenna, a radiation unit assembly, a radiation unit mounting structure and a fixing seat. The radiation unit mounting structure comprises a low-frequency radiation unit, a high-frequency radiation unit, a feed substrate and a fixing seat, wherein the fixing seat comprises a strip-shaped waistline portion arranged on the bottom surface of the base, two handrail portions formed by extending the two ends of the waistline portion, each handrail portion corresponds to one of the mounting columns and is provided with an avoiding hole, a feed hole is formed in the corresponding feed column, the top surface of the fixing seat is clamped with the base, and the bottom surface of the fixing seat is clamped with the feed substrate. The radiation unit mounting structure can more stably fix a plurality of radiation units therein and avoid mutual collision and scratch.

Description

Multi-frequency antenna, radiation unit assembly, radiation unit mounting structure and fixing seat

Technical Field

The invention relates to the technical field of communication, in particular to a multi-frequency antenna, a radiation unit assembly, a radiation unit mounting structure and a fixing seat.

Background

With the development of the communication industry, miniaturized, multiband and multi-standard base station antennas are becoming mainstream antennas applied in the communication industry. In the base station antenna structure, the quality of the radiation unit itself and the quality of installation have a direct influence on the overall antenna specifications as the most important component. In order to improve the space utilization rate of the antenna, a small radiation unit is nested into another radiation unit for assembly welding in the conventional radiation unit combination, and after the welding is finished, the two radiation units are movable mutually, and are easy to collide with each other to cause scratches, winding and the like, so that the performance of the antenna is finally influenced.

Disclosure of Invention

An object of the present invention is to provide a radiation unit mounting structure that fixes a plurality of radiation units.

Another object of the present invention is to provide a fixing base, a radiation unit assembly and a multi-frequency antenna.

In order to achieve the above object, the present invention provides a radiation unit mounting structure, including a low-frequency radiation unit, a high-frequency radiation unit, a feed substrate, and a fixing base, wherein the low-frequency radiation unit has an annular base, a pair of feed posts for passing through an antenna reflection plate and a pair of mounting posts for locking the antenna reflection plate are disposed on a bottom surface of the low-frequency radiation unit, the high-frequency radiation unit is embedded in a hole region formed by the base, a bottom of the high-frequency radiation unit is mounted and connected in the feed substrate, the feed substrate is fixed to the antenna reflection plate, the fixing base includes a belt-shaped waistline portion attached to the bottom surface of the base, two handrail portions formed by extending from two ends of the waistline portion, each handrail portion has an avoiding hole corresponding to one of the mounting posts, a feed hole corresponding to one of the feed posts is disposed, a top surface.

Furthermore, the pair of mounting columns are symmetrically distributed on two sides of the base, and the feed columns are symmetrically distributed on the base adjacent to the mounting columns and are located on the same side of a connecting line formed by the pair of mounting columns.

Furthermore, the armrest part of the fixed seat corresponds to the feed column and the mounting column, so that the feed column is located at the tail end of the armrest part, and the mounting column is correspondingly located on the inner side of the armrest part.

Furthermore, the top surface of the fixed seat, the armrest part and the waist part form the same plane, and a plurality of first fasteners with discrete positions are arranged on the plane and are used for being tightly fastened with the top surface of the base.

Furthermore, a plurality of second fasteners with discrete positions are arranged on the bottom surface of the fixed seat and used for clamping the feed substrate, wherein the respective fasteners penetrate through the feed substrate.

Furthermore, one side of the feed substrate, which is used for being connected with the high-frequency radiating unit, is tapered to form a tongue-shaped part, a positioning hole is arranged on the feed substrate outside the tongue-shaped part, two clamping pieces are respectively formed on the outer walls of the two feed holes of the armrest part of the fixed seat in the second clamping piece to respectively clamp the two sides of the tongue-shaped part, and one clamping piece is arranged on the side surface of the pin piece fixedly arranged on the bottom surface of the fixed seat to clamp the hole wall of the positioning hole when the pin piece passes through the positioning hole.

Preferably, the fixed seat is further provided with a stopping point for stopping the tongue-shaped portion of the feed substrate at a position, adjacent to the second fastener, on the outer wall of the feed hole, and after the second fastener clamps the feed substrate, a loosening margin for movement of the feed substrate in the installation stage is reserved between the protruding fastener tongue of the second fastener and the stopping point.

Further, the fixing base is an integrated piece, and the thicknesses of the feed hole and the avoiding hole are both larger than the thickness of the waistline portion.

Further, the feed substrate is provided with another high-frequency radiating element that does not need to be nested with any low-frequency radiating element, at an opposite side to a side on which the high-frequency radiating element is mounted.

In order to achieve another object of the present invention, the present invention provides:

the invention provides a fixing seat, which is a fixing seat in the radiation unit mounting structure provided by the invention.

A radiation unit assembly comprises the radiation unit mounting structure provided by the invention.

A multi-frequency antenna comprises at least one composite radiation unit column, wherein the radiation unit column radiates a first frequency band signal of low frequency through a first nested column formed by low-frequency radiation oscillators, radiates a second frequency band signal of high frequency through a second nested column formed by high-frequency radiation oscillators, the radiation unit column comprises a plurality of radiation unit assemblies, the radiation unit assemblies are coaxially arranged, the low-frequency radiation units in the radiation unit assemblies jointly form the first nested column, and the high-frequency radiation units in the radiation unit assemblies jointly form the second nested column.

The technical scheme provided by the invention has the beneficial effects that:

according to the radiation unit mounting structure provided by the invention, by adopting the design of buckling the base of the low-frequency radiation unit and fixing the feed substrate, the high-frequency radiation unit and the low-frequency radiation unit which are nested together can be relatively fixed, and the mutual collision and scratch between the two radiation units in the transfer process of the radiation unit mounting structure are avoided; the outer wall of the feed hole can be matched with a through hole on the antenna reflecting plate for positioning, so that the installation of the radiation unit component can be assisted; the fixing base is a half-opening design, and can meet the requirement that the radiation unit mounting structure is assembled after the radiation unit and the feed substrate are welded, so that the situation that the fixing base is damaged due to welding after the assembly is finished is avoided.

After the radiation unit assembly and the antenna reflecting plate are fixedly installed, the fixed seat does not influence the tight installation between the feed substrate and the antenna reflecting plate, and meanwhile, the fixed seat can play a role of pre-positioning and is convenient to install; the fixing base can also protect a low-frequency radiation unit feed column in the radiation unit assembly from penetrating through the antenna reflection plate part and being scratched in the installation process.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below.

Fig. 1 is a schematic structural view of an exemplary embodiment of a radiation unit mounting structure of the present invention;

FIG. 2 is a view of the mounting base of the present invention, showing a perspective thereof;

FIG. 3 is a structural view of the fixing base of the present invention, showing another view thereof;

fig. 4 is a schematic structural view of another embodiment of the radiation unit mounting structure of the present invention;

fig. 5 is a schematic structural diagram of another embodiment of the feeding substrate of the radiation element mounting structure of the present invention;

fig. 6a is a schematic view of a first step of mounting the radiation unit mounting structure according to the present invention;

fig. 6b is a schematic view of a second step of mounting the radiation unit mounting structure of the present invention;

FIG. 6c is another schematic view of the second step of mounting the radiation unit mounting structure of the present invention;

fig. 6d is a schematic view of the third step of mounting the radiation unit mounting structure of the present invention;

fig. 6e is a schematic view of the fourth step of installing the radiation unit installation structure of the present invention;

FIG. 7 is a schematic view of the assembly of the radiation unit assembly and the antenna reflection plate according to the present invention;

fig. 8 is a schematic diagram of a multi-band antenna according to the present invention.

Detailed Description

Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and the embodiments of the present invention are illustrative only and are not intended to limit the scope of the present invention.

The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "coupled" may refer to direct coupling or indirect coupling via intermediate members (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.

It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing the devices, modules or units, and are not used for limiting the devices, modules or units to be different devices, modules or units, and are not used for limiting the sequence or interdependence relationship of the functions executed by the devices, modules or units.

The invention provides a radiation unit mounting structure M, as shown in fig. 1, comprising a low-frequency radiation unit 1, a high-frequency radiation unit 2, a feed substrate 3 and a fixing base 4.

The radiation unit mounting structure M includes radiation units of at least two frequency bands. In the present embodiment, the radiation element combination includes a low-frequency radiation element 1 and a high-frequency radiation element 2. The volume of the low-frequency radiation unit 1 is larger than that of the high-frequency radiation unit 2. The basic structure of the low-frequency radiation unit 1 includes: an annular base 11, an aperture region 110 is formed in the middle of the annular base 11, and a bottom surface surrounding the aperture region 110. The bottom surface is provided with a pair of power feeding posts 12 and a pair of mounting holes 13. The feed column 12 penetrates through the antenna reflection plate and realizes the electrical connection between the low-frequency radiation unit 1 and the signal feed cable, and the mounting column 13 is used for fixedly connecting the low-frequency radiation unit 1 and the antenna reflection plate in a locking manner. The pair of mounting posts 13 are symmetrically distributed on two sides of the base 11, and the feeding posts 12 are symmetrically distributed on the base 11 adjacent to the mounting posts 13 and are all located on the same side of a connecting line formed by the pair of mounting posts 13.

In order to improve the space utilization of the antenna, the high-frequency radiating element 2 with a small volume is nested into the low-frequency radiating element 1 with a large volume in the embodiment. The bottom of the high-frequency radiating unit 2 is embedded in a hole area 110 formed by a base 11 of the low-frequency radiating unit 1, a connecting part at the bottom of the high-frequency radiating unit 2 penetrates through the hole area 110 to be fixedly connected with the feed substrate 3, and finally the low-frequency radiating unit 1, the high-frequency radiating unit 2 and the feed substrate 3 are further buckled and fixed by the fixing seat 4.

The specific structure of the fixing base 4 is as shown in fig. 2 and fig. 3, the fixing base 4 includes a belt-shaped waistline portion 41, the shape and size of which match the shape of the bottom surface of the base 11 of the low-frequency radiating unit, and when in use, the waistline portion 41 fits the bottom surface of the base 11. Along the positions of the two ends of the waist portion 41 corresponding to the feeding post 12 and the mounting post 13 on the two sides of the base 11, an armrest portion 42 is respectively formed by extending,

a feeding hole 44 is provided at the end of the armrest part 42, the feeding hole 44 corresponds to the feeding post 12 of the base 11 of the low frequency radiating element 1, and the feeding post 12 can extend through the feeding hole 44 when the fixing base 4 is applied. Each armrest part 42 is further provided with an avoiding hole 43 corresponding to the mounting post 13 of the base 11 of the low-frequency radiating unit 1 at one end connected to the waist part 41, and the avoiding hole 43 allows a mounting screw to pass through the avoiding hole to fixedly connect the radiating unit mounting structure M and the antenna reflection plate.

Since the feeding post 12 has a certain height, the feeding hole 44 is designed to have a certain thickness to cover the feeding post 12, but the height of the feeding hole is such that the feeding post does not obstruct the feeding post from passing through the reflection plate. The avoiding hole 43 needs to pass through a mounting screw to realize the fixed connection between the radiation unit mounting structure M and the antenna reflection plate, so that the avoiding hole 43 is designed with a certain height to enhance the mounting stability of the mounting part. Therefore, in the overall design of the fixing base 4, the thickness of the avoiding hole 43 and the power feeding hole 44 is larger than the thickness of the waist portion 41, wherein the thickness of the power feeding hole 44 is the largest.

The fixed seat 4 is formed by two sides of the waistline portion 41 and the armrest portion 42 to form a top surface 45 and a bottom surface 46, wherein the top surface 45 is relatively flat, and the armrest portion 42 and the waistline portion 41 are formed on the same plane on the top surface 45. The bottom surface 46 is uneven because the thickness of the waistline portion 41 is different from that of the power feeding hole 44 and the avoiding hole 43, and the avoiding hole 43 and the power feeding hole 44 are protruded in the direction of the bottom surface 46. When the product is used, the top surface 45 of the fixing seat 4 is attached to the bottom surface of the base 11 of the low-frequency radiating unit 1, the top surface 45 of the fixing seat 4 is clamped with the base 11, and the bottom surface 46 clamps the feed substrate 3.

The top surface 45 of the fixed seat 4 is provided with a plurality of first fasteners 47 with discrete positions, which are used for tightly fastening with the top surface (not marked) of the base 11 of the low-frequency radiating unit. The number and the position distribution of the first fasteners 47 can be set according to requirements. In this embodiment, preferably, three first latches 47 are provided. The first fastener 471 is disposed at the outer edge of the middle portion of the waist portion, the second and third fasteners 472, 473 are disposed at the outer sides of the two handrail portions 42 avoiding holes 43, and the three first fasteners 47 are fastened to the base 11 with a triangular stable relationship.

A plurality of second fasteners 48 with discrete positions are disposed on the bottom surface 46 of the fixing base 4 for clamping the feeding substrate 3, and the number of the second fasteners 48 may be set according to requirements. In this embodiment, it is preferable to provide three second fasteners 48, a first second fastener 481 is provided at a certain position in the middle of the waist portion 41, and a second fastener 482 and a third second fastener (not shown) are respectively provided at the outer walls of the inner sides of the feeding holes 44 at the ends of the two armrest portions 42, so as to clamp the feeding substrate 3 in a triangular stable relationship.

A pin 49 is further provided on the waistline portion 41 of the bottom surface 46 of the fixing base 4, in this embodiment, the second fastener 481 provided on the waistline portion 41 is provided at the side surface of the pin 49, and the second fastener 481 and the pin 49 together pass through the positioning hole 32 of the feeding substrate 3 to clamp the hole wall of the positioning hole 32 so as to clamp the feeding substrate 3.

The fixed seat 4 is further provided with a stopping point 410 for stopping the tongue-shaped portion 33 of the feeding substrate 3 at a position, adjacent to the second fasteners 482 and 483, on the outer wall of the feeding hole 44, and after the second fastener 48 clamps the feeding substrate 3, a loose margin for the feeding substrate 3 to move in the mounting stage is reserved between the protruding fastening tongue of the second fastener and the stopping point 410.

The fixing seat 4 is an integrated part and can be made of plastic.

The feed substrate 3 is used to connect the high-frequency radiation element 2 and the low-frequency radiation element 1 from the viewpoint of the mounting structure.

The invention provides a radiation unit mounting structure M, which comprises a low-frequency radiation unit 1 and at least one high-frequency radiation unit 2.

In an embodiment in which the radiating element mounting structure M includes a low-frequency radiating element 1 and a high-frequency radiating element 2, as shown in fig. 4 and 5, the structure of the feeding substrate 3 includes an elongated main body 30, and a tongue 33 extending from one side of the main body 30.

The size of the tongue part 33 matches the distance between the two feed holes 44 of the fixing base 4, and a plurality of welding holes 31 and positioning holes 32 welded to the high-frequency radiating unit 1 are provided at positions other than the tongue part 3 of the feed substrate 3, that is, at the main body part 30.

The position of the welding hole 31 corresponds to the connecting piece at the bottom of the high-frequency radiating unit 2, when the feed substrate 3 is applied and installed, the welding hole 31 is located in a hole area 110 formed in the middle of the annular base 11 of the low-frequency radiating unit 1, and the position of the positioning hole 32 is matched with the position of the pin piece 49.

The tongue-shaped portion 33 is disposed between the two feeding holes 44, and the second fasteners 482 and 483 located inside the feeding holes 44 respectively fasten two sides of the tongue-shaped portion 33.

Whereas in the present embodiment, the radiation element mounting structure M includes one low-frequency radiation element 1 and two high-frequency radiation elements 2, referring to fig. 1, the feed substrate 3 is provided with another high-frequency radiation element 2 that does not need to be nested with any low-frequency radiation element 1, at the opposite side to the side on which the high-frequency radiation element 2 is mounted.

Therefore, compared with the previous embodiment, the mounting structure of the feeding substrate 3 is different in that another set of welding holes 32 is provided at the end of the feeding substrate 3 where the high-frequency radiating element 2 is not connected to the nest, and the feeding substrate 3 does not need to be provided with the tongue-shaped portion 33 at the end.

The specific structural configuration of the radiation unit mounting structure M provided by the invention is described above, and the design principle and the beneficial effects of the mounting structure M are further described below by the specific implementation of the specific mounting steps of the low-frequency radiation unit 1, the high-frequency radiation unit 2, the feed substrate 3 and the fixing base 4 in the structure.

The radiation unit mounting structure M includes a low-frequency radiation unit 1 and two high-frequency radiation units 2.

The method comprises the following steps: referring to fig. 6a, a first high-frequency radiating element 21 is welded and nested with the feed substrate 3 at the low-frequency radiating element base 11, and a second high-frequency radiating element 22 is welded at the other end of the feed substrate 3. At this time, the feed substrate 3 is not fixed to the base 11 of the low-frequency radiating element 1, and a certain amount of movement is provided outside the base 11. It is convenient to mount the fixing base 4 to a corresponding position later.

Step two: referring to fig. 6b and 6c, the fixing base 4 passes through the feeding substrate 3, the top surface 45 (not shown in the figure, which is opposite to the bottom surface 46) of the fixing base 4 faces the base 11 of the low frequency radiating unit 1, the two feeding holes 44 of the two fixing bases are sleeved on the feeding post of the low frequency radiating unit 1, the avoiding hole 43 of the fixing base 4 is aligned with the mounting hole, the feeding post 12 is located at the end of the armrest portion 42, and the mounting post 13 is correspondingly located inside the armrest portion 42.

Step three: referring to fig. 6d, after the position of the fixing seat 4 is determined, the fixing seat 4 is pressed towards the direction of the base 11, three first fastening pieces 47 arranged on the top surface 45 of the fixing seat are respectively fastened on the base 11, and the fixing seat 4 is fixedly connected with the base 11.

Step four: referring to fig. 6e, after the fixing base 4 and the base 11 are fixed together, the tongue portion 33 of the feeding substrate 3 is placed between the two feeding holes 44 of the fixing base 4, and the stopping point 410 (covered by the feeding substrate 3 in the figure) arranged inside the outer wall of the feeding hole 44 has a function of stopping and supporting the feeding substrate 3. Aligning the positioning hole 32 of the feeding substrate 3 of the fixing base with the pin 49 on the bottom surface of the fixing base, and pressing the feeding substrate 3 toward the base 11 until the three second fasteners 48 at the bottom of the fixing base 4 respectively fasten the feeding substrate 3.

And after the fourth step is completed, the combined installation of the radiation unit installation structure M is completed.

The fixing seat 4 in the radiation unit mounting structure M can relatively fix the high-frequency radiation unit 2 and the low-frequency radiation unit 1 which are nested together, so that the two radiation units are prevented from colliding and scratching each other in the transfer process of the radiation unit mounting structure M;

the fixing seat 4 is designed to be a semicircular opening, so that the radiation unit mounting structure M can be assembled after the radiation unit and the feed substrate 3 are welded, and the situation that the fixing seat is damaged due to welding after the assembly is finished is avoided.

The invention also provides a radiation unit component and a multi-frequency antenna.

The radiation unit assembly comprises the radiation unit mounting structure M, and the radiation unit assembly is mounted in the antenna reflection plate. As shown in fig. 7, the radiation element assembly is fixed to the antenna reflection plate 6 by screws 5 through via holes in the antenna reflection plate 6 corresponding to the avoiding holes 43 and the mounting holes 13 in the radiation element mounting structure M, and the feed substrate 3 is fixed to the antenna reflection plate 6 by other parts.

Through the design of the fixed seat 4, the outer wall of the feed hole 44 can be matched with the via hole on the antenna reflecting plate 6 for positioning, so that the installation of the radiation unit component can be assisted;

secondly, after the radiation unit assembly and the antenna reflection plate are fixedly mounted, the fixed seat 4 does not affect the tight mounting between the feed substrate 3 and the antenna reflection plate 6, and meanwhile, the fixed seat 4 can play a role of pre-positioning and is convenient to mount;

in addition, the fixed seat 4 has a protective effect on the part, which penetrates through the antenna reflection plate 6, of the low-frequency radiation unit feed column 12 in the radiation unit assembly, so that the low-frequency radiation unit feed column is prevented from being scratched in the installation process.

The invention provides a multi-frequency antenna, as shown in fig. 8, which comprises at least one composite radiation unit column, wherein the radiation unit column radiates a first frequency band signal of low frequency through a first nested column composed of low-frequency radiation oscillators, and radiates a second frequency band signal of high frequency through a second nested column composed of high-frequency radiation oscillators, the radiation unit column comprises radiation unit assemblies containing radiation unit mounting structures M, a plurality of radiation unit assemblies are coaxially arranged, the low-frequency radiation units in the radiation unit assemblies jointly form the first nested column, and the high-frequency radiation units in the radiation unit assemblies jointly form the second nested column.

The foregoing description is only exemplary of the preferred embodiments of the invention and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention according to the present invention is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the scope of the invention as defined by the appended claims. For example, the above features and (but not limited to) features having similar functions of the present invention are mutually replaced to form the technical solution.

Claims (12)

1. A radiation unit mounting structure comprises a low-frequency radiation unit, a high-frequency radiation unit, a feed substrate and a fixed seat, wherein the low-frequency radiation unit is provided with an annular base, the bottom surface of the low-frequency radiation unit is provided with a pair of feed columns for passing through an antenna reflection plate and a pair of mounting columns for locking the antenna reflection plate, the high-frequency radiation unit is nested in a hole area formed by the base, the bottom of the high-frequency radiation unit is mounted and connected in the feed substrate, and the feed substrate is fixedly arranged with the antenna reflection plate, and the low-frequency radiation unit mounting structure:

the fixing base is including the laminating banded waistline portion that the base bottom surface set up, extend two handrail portions that form in waistline portion both ends, every handrail portion corresponds one of them erection column and is provided with the hole of dodging, corresponds one of them feed post and is provided with the feed hole, the fixing base top surface with the base is blocked mutually and is established, the bottom surface centre gripping the feed base plate.

2. The radiating-unit mounting structure according to claim 1, wherein: the pair of mounting columns are symmetrically distributed on two sides of the base, and the feed columns are symmetrically distributed on the base and adjacent to the mounting columns and are located on the same side of a connecting line formed by the pair of mounting columns.

3. The radiating-unit mounting structure according to claim 2, wherein: the armrest part of the fixed seat corresponds to the feed column and the mounting column, so that the feed column is positioned at the tail end of the armrest part, and the mounting column is correspondingly positioned at the inner side of the armrest part.

4. The radiating-unit mounting structure according to claim 3, wherein: the top surface of the fixed seat, the armrest part and the waistline part form the same plane, and a plurality of first buckling pieces with discrete positions are arranged on the plane and are used for being tightly buckled with the top surface of the base.

5. The radiating-unit mounting structure according to claim 3, wherein: and a plurality of second buckling pieces with discrete positions are arranged on the bottom surface of the fixed seat and used for clamping the feed substrate, wherein the individual buckling pieces penetrate through the feed substrate.

6. The radiating-unit mounting structure according to claim 5, wherein: one side of the feed substrate, which is used for being connected with the high-frequency radiation unit, is tapered to form a tongue-shaped part, a positioning hole is arranged on the feed substrate outside the tongue-shaped part, two clamping parts are respectively formed on the outer walls of two feed holes of the armrest part of the fixed seat in the second clamping part to respectively clamp the two sides of the tongue-shaped part, and one clamping part is arranged on the side surface of the pin part fixedly arranged on the bottom surface of the fixed seat to clamp the hole wall of the positioning hole when the pin part passes through the positioning hole.

7. The radiating-unit mounting structure according to claim 6, wherein: the fixed seat is also provided with a stop point for stopping the tongue-shaped part of the feed substrate at the position, adjacent to the second buckle piece, of the outer wall of the feed hole, and after the second buckle piece clamps the feed substrate, a loosening allowance for the feed substrate to move in the installation stage is reserved between the outward protruding buckle tongue of the second buckle piece and the stop point.

8. The radiating-unit mounting structure according to any one of claims 1 to 7, wherein: the fixing base is an integrated piece, and the thickness of feed hole and dodge the hole all is greater than the thickness of waistline portion.

9. The radiating-unit mounting structure according to any one of claims 1 to 7, wherein: the feed substrate is provided with another high-frequency radiating element which is not required to be nested with any low-frequency radiating element, at the opposite side to the side on which the high-frequency radiating element is mounted.

10. A mount, characterized by: the fixing seat is the fixing seat as claimed in any one of claims 1 to 9.

11. A radiating-unit assembly, characterized by: comprising the radiating element mounting structure of claim 9.

12. A multiple frequency antenna comprising at least one composite array of radiating elements radiating a first frequency band signal of low frequency through a first nested array of low frequency radiating elements and radiating a second frequency band signal of high frequency through a second nested array of high frequency radiating elements, characterized by: the radiating element array comprises a plurality of radiating element assemblies according to claim 11, wherein the plurality of radiating element assemblies are coaxially arranged, the low-frequency radiating elements in the radiating element assemblies jointly form the first nested array, and the high-frequency radiating elements in the radiating element assemblies jointly form the second nested array.

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