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CN-122026078-A - Small interphone antenna compatible with LTE low frequency band in broadband

CN122026078ACN 122026078 ACN122026078 ACN 122026078ACN-122026078-A

Abstract

The invention relates to the technical field of wireless communication antennas, and provides a broadband compatible LTE low-frequency-band small interphone antenna which comprises a connecting component, a main radiator, a dielectric supporting layer, a coupling conducting layer and an outer protective layer, wherein the connecting component is used for being electrically connected with an interphone radio-frequency feeder, the main radiator is electrically connected with the connecting component and is of a spiral spring structure, the dielectric supporting layer is coated or sleeved on the outer side of the main radiator, annular protrusions are arranged on the outer surface of the dielectric supporting layer, the coupling conducting layer is arranged on the annular protrusions, a capacitive coupling structure is formed between the coupling conducting layer and the main radiator, and the outer protective layer is arranged on the outer sides of the dielectric supporting layer and the coupling conducting layer. Through the technical scheme, the problems that the conventional interphone antenna is difficult to consider the coverage of an intercom communication frequency band and an LTE low frequency band under a miniaturized structure, the whole structure is complex, and the low frequency band matching performance is poor are solved.

Inventors

  • JIANG LI

Assignees

  • 东莞市普尔信通讯器材有限公司

Dates

Publication Date
20260512
Application Date
20260408

Claims (10)

  1. 1. A broadband compatible LTE low-band small intercom antenna, comprising: the connecting component (1) is used for being electrically connected with the interphone radio frequency feeder line; The main radiator (2) is electrically connected with the connecting assembly (1), and the main radiator (2) is of a spiral spring structure; The medium supporting layer (3), the medium supporting layer (3) is coated or sleeved on the outer side of the main radiator (2), and annular bulges (5) are arranged on the outer surface of the medium supporting layer (3); the coupling conducting layer (4) is arranged on the annular bulge (5) on the outer surface of the medium supporting layer (3), the coupling conducting layer (4) is not directly conducted with the main radiator (2), and a capacitive coupling structure is formed between the coupling conducting layer (4) and the main radiator (2) through the medium supporting layer (3); And the outer protection layer (6) is arranged outside the medium supporting layer (3) and the coupling conducting layer (4).
  2. 2. The small-sized interphone antenna compatible with the LTE low frequency band in the broadband of claim 1, wherein the connecting assembly (1) comprises a center pin (101), an insulator (102) and a shell (103), the insulator (102) is fixedly sleeved on the outer side of the center pin (101), the shell (103) is fixedly sleeved on the outer side of the insulator (102), the shell (103) and the center pin (101) are mutually insulated, and threads are formed in the bottom of the outer wall of the shell (103).
  3. 3. The small-sized interphone antenna compatible with the LTE low frequency band of the claim 2, characterized in that the main radiator (2) is crimped or fixedly connected with the center pin (101) to feed the interphone radio frequency signal into the main radiator (2).
  4. 4. The broadband-compatible small-sized interphone antenna of the LTE low-frequency band according to claim 2, characterized in that the center pin (101) and the main radiator (2) are made of one of brass, beryllium copper or phosphor bronze, and are provided with one of nickel plating, gold plating or silver plating on the outer surface thereof, and the housing (103) is made of brass, stainless steel, zinc alloy or other conductive metal materials.
  5. 5. The wideband compatible LTE low-frequency band small intercom antenna according to claim 1, wherein the coupling conductive layer (4) is any one of a conductive tape, a conductive film, a metal foil, a flexible circuit board conductive layer, or a metallized conductive layer formed on the surface of the dielectric supporting layer (3), and the coupling conductive layer (4) has a non-fully closed special-shaped conductive pattern, and the special-shaped conductive pattern makes surface current flow around a preset boundary by changing a surface current distribution path, so as to increase the equivalent electrical length of the coupling conductive layer (4) and form an LTE low-frequency band resonance mode.
  6. 6. The small interphone antenna compatible with the LTE low frequency band in the broadband of claim 5, wherein a positioning hole (8) is formed in the coupling conducting layer (4) in a penetrating manner, and a positioning column (7) matched with the positioning hole (8) is fixed on the annular protrusion (5) of the medium supporting layer (3) so as to realize positioning and installation of the coupling conducting layer (4).
  7. 7. The small-sized interphone antenna compatible with the broadband LTE low frequency band according to claim 1, wherein the main radiator (2) and the coupling conducting layer (4) jointly form a dual-mode radiation structure, the main radiator (2) is used for forming main resonance of an intercom communication frequency band, and the coupling conducting layer (4) serves as an auxiliary radiator to form LTE low frequency band resonance through capacitive coupling action with the main radiator (2).
  8. 8. The broadband compatible small-sized interphone antenna of the LTE low frequency band according to claim 1, wherein the dielectric supporting layer (3) is made of an insulating polymer material, the insulating polymer material is one of TPE, TPU, silica gel, polyethylene, polypropylene, ABS, nylon or PBT, and the dielectric supporting layer (3) is used for forming a stable dielectric isolation and capacitive coupling interface between the main radiator (2) and the coupling conducting layer (4).
  9. 9. The wideband compatible LTE low-frequency band small intercom antenna of claim 1 wherein said outer protective layer (6) is made of a flexible polymer protective material, said flexible polymer protective material being one of TPE, TPU, silicone rubber, PVC, ABS or polyolefin elastomer, to achieve mechanical protection and appearance cladding of said coupling conductive layer (4) and main radiator (2).
  10. 10. An interphone communication device, characterized by comprising a body, a radio frequency circuit and the miniaturized interphone antenna compatible with the LTE low frequency band according to any one of claims 1 to 9, wherein the radio frequency circuit is connected with the antenna through the connecting component (1), so that the interphone communication device has both an intercom communication function and an LTE low frequency band cellular communication function.

Description

Small interphone antenna compatible with LTE low frequency band in broadband Technical Field The invention relates to the technical field of wireless communication antennas, in particular to a small interphone antenna compatible with an LTE low frequency band in a broadband mode. Background Along with the development of wireless communication technology, the interphone products gradually evolve towards intellectualization and multifunctionalization. The existing novel interphone integrates cellular communication functions more and more besides the traditional private network intercom function so as to meet application requirements of cooperative communication of a public network and a private network, and particularly in emergency communication, public safety, industrial scheduling, logistics transportation and other scenes, terminal equipment is generally required to have traditional intercom communication capability and LTE cellular network communication capability at the same time. However, the intercom antenna in the prior art is generally designed mainly for the intercom communication frequency band, and it is difficult to consider the effective coverage of the LTE low frequency band, especially the low frequency cellular frequency band of 698-760MHz, while the LTE low frequency band has a longer corresponding wavelength, and if good low frequency radiation performance is to be realized, a larger electrical length is generally required, which is obviously contradictory with the miniaturization design requirement of the intercom antenna. In order to solve the problems, the existing part of terminals adopt a mode of independently arranging an intercom antenna and an LTE antenna so as to respectively meet intercom communication and cellular communication requirements, but the scheme can lead to complex structure of the whole terminal, larger occupied space, increased assembly difficulty and increased cost, is unfavorable for miniaturization and appearance integrated design of the terminal equipment, and the other part of the terminals try to realize multi-frequency operation through a single antenna, but under the condition of smaller size, stable and effective resonance is difficult to form in an LTE low frequency band, so that the impedance matching performance of the low frequency band is poor, and the actual communication requirements are difficult to meet. Therefore, how to realize compatibility between the intercom communication frequency band and the LTE low frequency band on the basis of maintaining the miniaturized structure of the intercom antenna becomes a technical problem to be solved in the art. Disclosure of Invention In order to overcome the defects, the invention provides a small interphone antenna compatible with an LTE low frequency band in a broadband manner, which solves the problems that the interphone antenna in the prior art is difficult to consider the coverage of an intercom communication frequency band and the LTE low frequency band under a miniaturized structure, the whole structure is complex and the matching performance of the low frequency band is poor. According to one aspect, at least one embodiment of the present invention provides a small-sized interphone antenna having a wideband compatible LTE low frequency band, including: the connecting component is used for being electrically connected with the interphone radio frequency feeder line; the main radiator is electrically connected with the connecting component and is of a spiral spring structure; The medium supporting layer is coated or sleeved on the outer side of the main radiator, and annular protrusions are arranged on the outer surface of the medium supporting layer; the coupling conducting layer is arranged on the annular bulge on the outer surface of the medium supporting layer, the coupling conducting layer is not directly conducted with the main radiator, and a capacitive coupling structure is formed between the coupling conducting layer and the main radiator through the medium supporting layer; and the outer protective layer is arranged on the outer sides of the medium supporting layer and the coupling conducting layer. For example, in the small intercom antenna with broadband compatible LTE low frequency band provided by at least one embodiment of the present invention, the connection assembly includes a center pin, an insulator and a housing, the insulator is fixedly sleeved on the outer side of the center pin, the housing is fixedly sleeved on the outer side of the insulator, the housing and the center pin are mutually insulated, and the bottom of the outer wall of the housing is provided with threads. For example, in a small intercom antenna with wideband compatible LTE low frequency band provided in at least one embodiment of the present invention, the main radiator is crimped or fixedly connected with the center pin, so as to feed the intercom radio frequency signal into the main radiator. For example, i