Multi-band quadrifilar helical antenna for portable communication equipment

Abstract

The invention discloses a multi-band four-arm helical antenna for portable communication equipment, belonging to the field of antenna technology, comprising: an S-band four-arm helical antenna unit connected to an antenna feeding network; a B1 / B3-band four-arm helical antenna unit connected to an antenna feeding network; the invention supports the B1 / B3 frequency band of Beidou satellite navigation and positioning, and the Beidou third-generation communication transmitting and receiving frequency bands through a laminated four-arm helical antenna and a channel separation technology, and realizes L, S and B1 / B3 frequency band processing respectively, and S and B1 / B3 are combined through different frequency duplexing and output through a dual-channel connector, thereby ensuring antenna gain, and simultaneously performing signal processing on different channels respectively, thereby improving the anti-interference capability of the system, ensuring signal quality, and realizing structural miniaturization, namely, a light and small integrated technology, replacing multiple antenna functions with one antenna, saving space and cost, and being able to be quickly disassembled and assembled.

Description

Technical Field

[0001] The invention belongs to the technical field of antennas, and in particular relates to a multi-band four-arm helical antenna for portable communication equipment. Background Art

[0002] Since the Beidou satellite navigation system was put into service, it has been widely used in the fields of transportation, agriculture, forestry and fishery, hydrological monitoring, communication timing, disaster relief and reduction, etc., producing significant economic and social benefits. Based on the Beidou satellite navigation system, which has both positioning and communication functions, it has been widely used in e-commerce, mobile smart terminals, and navigation positioning. The third-generation Beidou satellite navigation system has multiple positioning frequency bands and communication frequency bands. The antennas of existing multi-band positioning mobile terminal devices and navigation positioning devices all use multiple antennas, which occupy a large space. There is also mutual interference between the two antennas, which reduces the antenna performance. In the existing technology, multi-frequency wires are combined into one channel to process signals together, and the system's anti-interference ability is weak. Summary of the invention

[0003] The present invention provides a multi-band four-arm helical antenna for portable communication equipment to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a multi-band four-arm helical antenna for a portable communication device, comprising: an S-band four-arm helical antenna unit connected to an antenna feeding network;

[0005] A B1 / B3 band four-arm helical antenna unit is connected to an antenna feeding network; a combiner is used to combine the S-band four-arm helical antenna unit and the B1 / B3 band four-arm helical antenna unit into one output, and a limiter and a low-noise amplifier are connected in sequence between the S-band four-arm helical antenna unit, the B1 / B3 band four-arm helical antenna unit and the combiner; a dual-channel antenna plug is connected to the combiner; an L-band four-arm helical antenna unit is connected to an antenna feeding network, and the antenna feeding network is connected to the dual-channel antenna plug.

[0006] Furthermore, a filter is connected between the low noise amplifier and the combiner.

[0007] Furthermore, another low noise amplifier is connected between the filter and the combiner.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] The present invention supports the Beidou satellite navigation and positioning B1 / B3 frequency band and the Beidou third-generation communication transmission and reception frequency band through the stacked four-arm helical antenna and channel separation technology, realizes L, S and B1 / B3 frequency band processing respectively, and S and B1 / B3 are combined through different frequency duplex and output through a dual-channel connector, thereby ensuring antenna gain, and at the same time, different channels can be processed respectively, thereby improving the system's anti-interference ability, ensuring signal quality, and avoiding the disadvantages of the prior art that multiple frequency antennas are combined into one channel for signal processing together, resulting in weak anti-interference ability of the system; and realizes structural miniaturization, that is, light and small integrated technology, replaces multiple antenna functions with one antenna, saves space and cost, and can be quickly disassembled and assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the working principle of the present invention.

[0011] Figure 2 It is a schematic diagram of the working principle of the heterodyne multiplexer of the present invention.

[0012] Figure 3 It is a schematic structural diagram of the multi-band four-arm helical antenna of the present invention.

[0013] In the figure: 1. medium support body; 2. hollow tube; 3. medium ring; 4. stacked structure. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1-3 , the present invention provides the following technical solutions:

[0016] A portable communication device multi-band four-arm helical antenna comprises: an S-band four-arm helical antenna unit connected to an antenna feeding network; a B1 / B3-band four-arm helical antenna unit connected to the antenna feeding network; a combiner for combining the S-band four-arm helical antenna unit and the B1 / B3-band four-arm helical antenna unit into one output, a limiter and a low-noise amplifier being connected in sequence between the S-band four-arm helical antenna unit, the B1 / B3-band four-arm helical antenna unit and the combiner; the limiter is used to reduce high-power signals received by the B1 / B3 and S antennas to protect the low-noise amplifier tube from being broken down; a dual-channel antenna plug connected to the combiner; an L-band four-arm helical antenna unit connected to the antenna feeding network, and the antenna feeding network is connected to the dual-channel antenna plug.

[0017] Preferably, a filter is connected between the low-noise amplifier and the combiner to filter out interference signals and improve signal quality; another low-noise amplifier is connected between the filter and the combiner to amplify weak signals and reduce noise.

[0018] In the above settings, the B1 / B3 / S band has a built-in limiter, a low-noise amplifier, and multi-stage filtering, which ensures good out-of-band suppression and strong anti-interference ability, ensuring normal operation in harsh electromagnetic environments and meeting high-precision measurement requirements. The L band has the characteristics of high gain, wide beam pattern, and good circular polarization.

[0019] In the present invention, a miniaturized structure is realized, that is, a light and small integrated technology, a function of multiple antennas is replaced by one antenna, and it has a multi-system multi-frequency point and channel separation technology, a frequency multiplexer technology, and an anti-burning technology;

[0020] Multi-system multi-frequency and channel separation technology: The antenna adopts a laminated multi-arm spiral antenna and independent channels to realize L, S and B1 / B3 frequency band processing respectively, and S and B1 / B3 are combined through different frequency duplex and output through dual-channel connectors. The application of this technology not only ensures the antenna gain, but also can process signals of different channels separately, improves the system's anti-interference ability, ensures signal quality, and avoids the disadvantages of the existing technology that uses multi-frequency antennas to merge one channel and process signals together, resulting in weak anti-interference ability of the system;

[0021] Different frequency multiplexing technology: The Beidou antenna adopts a spiral antenna design. In order to simultaneously meet the 1.258-2.5GHz signal combining, the traditional microstrip combiner cannot meet the requirements in terms of volume and working bandwidth. The present invention uses the different frequency points and narrow band characteristics to adopt different frequency multiplexing technology. The principle diagram is shown below. Figure 2 , which solves the problem of combining the three frequencies B1 / B3 / S, and has a small insertion loss and good impedance matching compared to ordinary combiners, thus ensuring the carrier-to-noise ratio of satellite signals;

[0022] Anti-burning technology: Anti-burning is a systematic technology in integrated antennas. The antenna unit radiation unit, antenna feed network and antenna low-noise amplifier module are designed. By adding a limiter in the antenna path and combining multi-stage narrowband filtering, the antenna's anti-burning ability is improved.

[0023] Lightweight and small integrated technology; the Beidou antenna is provided with a stacked structure 4, which is convenient for tuning the antenna working frequency. Three groups of four-arm helical antennas are provided to form a stack. The three groups of four-arm helical antennas are connected by a hollow tube 4 for support. Cables are arranged in the hollow tube 4 for signal transmission. A dielectric support body 1 is arranged at the bottom of the bottom four-arm helical antenna. The dielectric support body adopts a hollow or tubular hard support body. The top layer of the four-arm helical antenna is provided with a dielectric ring 3. The dielectric ring 3 adopts a material with lighter gravity, which can greatly reduce the weight of the antenna; see the antenna schematic diagram Figure 3 The antenna structure is light and small, with good directional pattern performance, taking into account the advantages of both stacked microstrip antennas and helical antennas, and is particularly suitable for portable devices or devices with strict weight requirements. And by selecting parasitic dielectric rings of different materials and sizes for adaptation, it is convenient to fine-tune the working frequency of the antenna, and the product consistency is better, which is more conducive to future mass production. In addition, the antenna unit is fixed by a mechanical clamping device, which saves product space, realizes product miniaturization, and can be quickly disassembled and assembled.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-band quadrifilar helical antenna for portable communication equipment, characterized in that: include: The S-band quadrifilar helical antenna unit is connected to the antenna feed network; B1 / B3 band quadrifilar helical antenna unit, connected to the antenna feed network; A combiner is used to combine the S-band quadrifilar helical antenna unit and the B1 / B3-band quadrifilar helical antenna unit into one output, and a limiter and a low-noise amplifier are connected in sequence between the S-band quadrifilar helical antenna unit, the B1 / B3-band quadrifilar helical antenna unit and the combiner; A dual-channel antenna plug, the dual-channel antenna plug is connected to a combiner; an L-band four-arm helical antenna unit is connected to an antenna feed network, the antenna feed network is connected to the dual-channel antenna plug; A filter is connected between the low noise amplifier and the combiner; Another low noise amplifier is connected between the filter and the combiner; There are three groups of four-arm helical antennas to form a stack. The three groups of four-arm helical antennas are connected by hollow tubes for support. Cables are arranged in the hollow tubes for signal transmission. A dielectric support body is arranged at the bottom of the bottom four-arm helical antenna. The dielectric support body adopts a hollow or tubular hard support body. A dielectric ring is arranged on the top layer of the four-arm helical antenna. The dielectric ring is made of lightweight material.

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