CN203503781U

CN203503781U - Automatic tuning backpack shortwave loop antenna

Info

Publication number: CN203503781U
Application number: CN201320642646.0U
Authority: CN
Inventors: 王毅; 张辉; 徐良
Original assignee: XI'AN XINGWANG ANTENNA TECHNOLOGY Co Ltd
Current assignee: XI'AN XINGWANG ANTENNA TECHNOLOGY Co Ltd
Priority date: 2013-10-18
Filing date: 2013-10-18
Publication date: 2014-03-26
Anticipated expiration: 2023-10-18

Abstract

The utility model discloses an automatic tuning backpack shortwave loop antenna. The antenna comprises a radiation ring, a matching ring, a supporting bar, a tuning network and a detection and control module. The radiation ring and the matching ring are fixed on the supporting bar. The matching ring is embedded in the radiation ring and ring surfaces of the radiation ring and the matching ring are located in a same plane. A lower end fracture of the radiation ring is connected with the tuning network through a coaxial cable. A lower end fracture of the matching ring is connected with the detection and control module through the coaxial cable. The detection and control module is connected with an output terminal of a broadcasting station through a radio frequency cable. A loop antenna input impedance is perceptual and a tuning network loop introduces a capacitance. Losses are low. Efficiency of the antenna is obviously higher than efficiency of a whip antenna with a same kind of purposes. The antenna of the utility model is a high elevation radiation and high Q value, can well make up a blind area of shortwave communication, simultaneously possesses certain directivity and a narrowband frequency selection characteristic. A signal to noise ratio can be obviously increased.

Description

Automatic tuning backpack shortwave loop antenna

Technical field

The utility model belongs to communication apparatus technical field, relates to a kind of automatic tuning backpack shortwave loop antenna.

Background technology

No matter short wave communication is because its intrinsic feature is current or all occupy very consequence in the future in military communication.Existing short wave communication mainly contains the antenna forms such as whip antenna, half loop antenna and dipole antenna, and its whole poor signal to noise, efficiency is on the low side, and communication distance is very limited.Whip antenna small volume, simple in structure, can be used for closely (earthwave) or remote (sky wave) communication, 2.4 meters or 10 meters of whip antennas bearing as conventional individual soldier, its effectively wave communication distance be 10 kilometers of left and right, the communication distance of sky wave is more than more than 100 kilometers, thereby between 20 to 100 kilometers, formed " quiescent region " of whip antenna short wave communication, also referred to as blind area.Dipole antenna is much better, but the structural limitations of its antenna its flexibility, can not perform well in shortwave individual soldier and bear mobile communication.

Utility model content

Main purpose of the present utility model is to provide a kind of automatic tuning backpack shortwave loop antenna, solves existing short-wave antenna poor signal to noise, efficiency is on the low side, communication distance is restricted, antenna structure is unsuitable for the defect that individual soldier bears mobile communication application.

In order to realize goal of the invention, the technical scheme that the utility model adopts is, a kind of automatic tuning backpack shortwave loop antenna, include radiation ring, coupling ring, support bar, tuning network, detect and control module, radiation ring and coupling ring are fixed on support bar, the anchor ring that coupling ring is nested in radiation ring inside and radiation ring and coupling ring is positioned at same plane, the lower end fracture of radiation ring is connected with tuning network, tuning network is connected with detection and control module, the lower end incision position of coupling ring is directly connected with detection and control module by coaxial cable, detection and control module are connected with the output in radio station by RF cable.

Feature of the present utility model is also, radiation ring is with the diameter that mates ring than being 4:1～6:1, and coupling ring is arranged on position on the upper side, radiation ring inside.

Detection and control module comprise standing wave detection module, frequency offset detection module, impedance detection module and single-chip microcomputer.

Tuning network is binary system tunable capacitor tuning network.

The beneficial effects of the utility model are:

1) loop antenna input impedance of the present utility model is perception, and what introduced in tuning network loop is electric capacity, and loss is extremely low, and its efficiency will be apparently higher than the whip antenna of similar purposes;

2) loop antenna of the present utility model is high elevation angle radiating antenna, can make up well the blind area of short wave communication, in reach non-blind area communication in closely;

3) loop antenna of the present utility model is high Q value antenna, has certain directivity and arrowband selecting frequency characteristic, can improve significantly signal to noise ratio.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present utility model;

Fig. 2 is that function of the present utility model realizes block diagram;

Fig. 3 is coupling ring of the present utility model and coaxial cable junction structure for amplifying schematic diagram.

In figure, 1. radiation ring, 2. coupling ring, 3. support bar, 4. tuning network, 5. detects and control module, 6. standing wave detection module, 7. frequency offset detection module, 8. impedance detection module, 9. single-chip microcomputer, 10. radio station, 11. coaxial cables, 12. heart yearns, 13. crusts.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.

The utility model provides a kind of automatic tuning backpack shortwave loop antenna, as shown in Figure 1, include radiation ring 1, coupling ring 2, support bar 3, tuning network 4, detect and control module 5, radiation ring 1 and coupling ring 2 are fixed on support bar 3, the anchor ring that coupling ring 2 is nested in radiation ring 1 inside and radiation ring 1 and coupling ring 2 is positioned at same plane, the lower end fracture of radiation ring 1 is connected with tuning network 4, tuning network 4 is connected with detection and control module (5), the lower end incision position of coupling ring 2 is directly connected with detection and control module 5 by coaxial cable, detection and control module 5 are connected with the output in radio station 10 by RF cable.

Embodiment 1: radiation ring 1 is with the diameter that mates ring 2 than being 5:1, and coupling ring 2 is arranged on position on the upper side, radiation ring 1 inside and adopts coupled modes to carry out feed, and antenna is operated in Mid Frequency 6MHz～10MHz.As shown in Figure 1, radiation ring 1 is connected in detection and control module 5 by tuning network 4, tuning network 4 is binary system tunable capacitor tuning network, tunable capacitor two ends are connected with the two ends of radiation ring 1 bottom fracture, as shown in Figure 2, the fracture two ends, bottom of coupling ring 2 are connected with crust 13 with the heart yearn 12 of coaxial cable 11 respectively, and the coaxial cable other end is directly connected in detection and control module 5.As shown in Figure 3, detection and control module 5 comprise standing wave detection module 6, frequency offset detection module 7, impedance detection module 8 and single-chip microcomputer 9.By single-chip microcomputer 9 control relays, regulate tuning network 4, in tuning process, by standing wave detection module 6, detect magnetic loop antenna standing wave (SWR), by more every some standing wave size, find minimum point, frequency offset detection module 7 is for detection of the frequency of transmitted signal, impedance detection module 8, for detection of the impedance variation of antenna, is processed and is controlled resonant network 4 by 9 pairs of parameter signals of single-chip microcomputer, thereby complete automatic tuning.

Embodiment 2: radiation ring 1 is with the diameter that mates ring 2 than being 4:1, and other structures are identical with embodiment 1, and now antenna can normally be worked at low-frequency range 2MHz～5MHz.

Embodiment 3: radiation ring 1 is with the diameter that mates ring 2 than being 6:1, and other structures are identical with embodiment 1, and now antenna can normally be worked at high band 15MHz～30MHz.

In order to verify real work performance of the present utility model, dual-mode antenna using the loop antenna of preferred embodiment 1 of the present utility model and vehicle-mounted half loop antenna and dipole antenna combination as internal field and outfield carries out short wave communication test, approximately 80 kilometers of communication distances, transmitting power is 20W, internal field adopts respectively vehicle-mounted half loop antenna (#1) and loop antenna of the present utility model (#2) to launch, vehicle-mounted half loop antenna (#1) for outfield, loop antenna of the present utility model (#2) and dipole antenna (#3) receive, three groups of data of each measurement, actual received signal to noise ratio test result is as shown in the table.

According to upper table data, with two transmitting terminals in internal field, carry out longitudinal comparison, along with increasing of frequency, the measured signal to noise ratio of loop antenna of the present utility model is more and more higher, and its communication quality is better than vehicle-mounted half loop antenna; Three receiving terminals with outfield carry out lateral comparison again, on each Frequency point, the measured signal to noise ratio of loop antenna of the present utility model will be apparently higher than vehicle-mounted half loop antenna, suitable with dipole antenna performance, and loop antenna volume of the present utility model will be much smaller than dipole antenna, even little a lot of than vehicle-mounted half loop antenna, be applicable to very much individual soldier and bear the short wave communication in situation.

More than show and described basic principle of the present utility model, principal character and advantage of the present utility model; above-mentioned execution mode and specification are principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall in claimed scope of the present utility model.The protection range that the utility model requires is defined by claims and equivalent thereof.

Claims

1. an automatic tuning backpack shortwave loop antenna, it is characterized in that, include radiation ring (1), coupling ring (2), support bar (3), tuning network (4), detect and control module (5), described radiation ring (1) and coupling ring (2) are fixed on support bar (3), the anchor ring that coupling ring (2) is nested in radiation ring (1) inside and radiation ring (1) and coupling ring (2) is positioned at same plane, the lower end fracture of radiation ring (1) is connected with tuning network (4), tuning network (4) is connected with detection and control module (5), the lower end incision position of coupling ring (2) is directly connected with detection and control module (5) by coaxial cable, detection and control module (5) are connected with the output of radio station (10) by RF cable.

2. a kind of automatic tuning backpack shortwave loop antenna as claimed in claim 1, it is characterized in that, described radiation ring (1) is with the diameter that mates ring (2) than being 4:1～6:1, and coupling ring (2) is arranged on the inner position on the upper side of radiation ring (1).

3. a kind of automatic tuning backpack shortwave loop antenna as claimed in claim 1, it is characterized in that, described detection and control module (5) include standing wave detection module (6), frequency offset detection module (7), impedance detection module (8) and single-chip microcomputer (9).

4. a kind of automatic tuning backpack shortwave loop antenna as claimed in claim 1, is characterized in that, described tuning network (4) is binary system tunable capacitor tuning network.