CN208401057U - Uplink/downlink antenna in space base relayed communications enhancing system - Google Patents

Abstract

The utility model belongs to wireless communication technology field, and in particular to the uplink/downlink antenna in a kind of space base relayed communications enhancing system, in order to realize in enhancing wide area, the beyond-the-horizon communication ability of more ultrashort wave radio set users.It is characterized by: it includes monopole, sleeve and reflecting plate；The monopole main part is cylindrical, and taper closing in is arranged at lower part, interconnecting piece is vertically provided with along the vertical direction in the lower end that taper closes up, for reinforcing the connection of monopole and sleeve；Sleeve uses double-sleeve structure, is divided into inside and outside bilayer；The main part of monopole is inserted into outer layer sleeve, and the interconnecting piece of monopole is inserted into inner layer sleeve；The lower end of sleeve is fixedly connected with reflecting plate.The sleeve monopole antenna of the utility model design is small in size, and is able to satisfy application demand in the radiation characteristic, port match characteristic, gain of required frequency range all angles, solves forwarding problems after downstream signal reception and frequency conversion.

Description

Uplink/downlink antenna in space base relayed communications enhancing system

Technical field

The utility model belongs to wireless communication technology field, and in particular under in a kind of space base relayed communications enhancing system Row antenna.

Background technique

1.1 application background

With mobile communication technology at home continuous universal, due to setting up for land mobile base station, in city, small towns etc. Densely inhabited district realizes all standing of movable signal substantially.However in recent years, emergency event takes place frequently, severe natural calamity Appearance huge damage is caused to the life security of social stability and people, in multiple disaster, based on static infrastructure Communication system and network and power supply system are by serious destruction, or even paralysis comprehensively, in the prime time of emergency disaster relief In, the communication linkage of minimum standard is difficult to set up, emergency management and rescue unit and disaster area internal staff confusing communication, it is difficult to aid decision Take rescue measure.In addition, China's overocean communications network construction is there are also to be improved, fishing boat, maritime patrol ship go to sea after means of communication It is extremely limited, once it is in an emergency or monitors important information, it is difficult to situation is fed back at the first time.Therefore, I State is very urgent for the demand of land emergency response communication and overocean communications.

In order to cope with the demand, also occur some relaying countermeasures for emergency communication, example in actual life in succession Such as Extemporaneous distribution satellite communication equipment, the communication relay that particular device is carried out using unmanned plane.But practical situations Be: requirement of the satellite communication to equipment is very harsh, and expensive, it is difficult to a large amount of universal；For existing UAV Communication For trunking scheme, the relaying load business function on unmanned plane is single, and the civil intercom largely used, radio station etc. are common Wireless telecom equipment can not connection, versatility is poor.In consideration of it, this patent is towards civil a large amount of existing ultrashort wave devices, base In unmanned aerial vehicle platform, the problem of fully considering isolation between transmitting and receiving antenna, to being detectd based on skill and the space base relayed communications of frequency conversion thought Two kinds of antennas of enhancing system are designed respectively.Wherein uplink/downlink antenna is located at ground signal forwarding subsystem, mainly to L frequency range Electric wave receive and be forwarded to the VHF electric wave after frequency conversion.In order to realize the impedance matching of wider bandwidth, reduce antenna Size, this patent use sleeve monopole antenna as antenna, efficiently solve the forwarding of converted signals in relatively short distance Demand.

1.2 prior arts and its advantage and disadvantage

Antenna is important component in wireless communication system, is responsible for the transmitting-receiving to electromagnetic wave and carries out gain, configuration is set Meter receives and dispatches frequency range on it, gain performance influences greatly.Antenna directivity design influences greatly antenna performance, and difference is directly led The radiation or ability to accept for causing antenna different to space.Antenna is divided into two kinds of omnidirectional and orientation.

Omnidirectional antenna shows as 360 ° of all homogeneous radiations on figure in the horizontal direction, i.e., non-directional.Lobe under normal circumstances Width is smaller, and gain is bigger.One class of applications distances is close in a communications system for omnidirectional antenna, and coverage area is big, low in cost.Orientation Antenna shows as certain angle range of radiation on figure in the horizontal direction, i.e., directional.The same with omnidirectional antenna, lobe width is got over Small, gain is bigger.Directional aerial is generally used for that communication distance is remote, and coverage area is small in communication system, and target density is big, frequency The high environment of utilization rate.For directional aerial, the region of omnidirectional antenna wave radiation is bigger, but cost is its increasing to signal Benefit it is weaker, can not priority support specify region in important traffic.Although directionality is stronger, the range of radiation has directional aerial Limit.Therefore, when being designed to antenna, it need to fully consider that practical application scene selects the configuration of antenna.

Sleeve monopole antenna is widely used in modern communications and remote sensing system as a kind of all channel antenna, Have the characteristics that structure is simple, weight is relatively light, directional diagram is stable and broader bandwidth.Since ground frequency converter is logical from ultrashort wave Letter receives terminal distance closely (< 10m), and not high to the directive gain demand of antenna, poliarizing antenna relative bandwidth is wider (31%), and Antenna size needs smaller (being located on portable type ground frequency converter), in order to realize the impedance matching in wider frequency segment limit, patent Select sleeve monopole antenna as ground frequency converter antenna.

Utility model content

The purpose of this utility model be in order to realize in enhancing wide area, the over the horizon of more ultrashort wave radio set users it is logical Letter ability, devising to detect based on skill enhances system with the space base relayed communications of frequency conversion forwarding thought, which is divided into aerial signal It forwards subsystem and ground signal to forward subsystem two parts, respectively empty, ground signal receive and frequency conversion forwards.It is different The Antenna Design of subsystem largely affects the ability of whole system communication enhancing.

The utility model is designed for the uplink/downlink antenna in ground signal forwarding subsystem, which is located at ground On portable frequency conversion forwarding device, it is responsible for receiving the L frequency band signals of downlink, and the VHF frequency band signals of down coversion is forwarded to supply neighbouring Ultra short wave communication equipment uses.Due in whole system designs, uplink/downlink antenna in ground signal forwarding subsystem from It receives terminal to be closer, and transceiving band is compared with therefore being designed to the sleeve single-stage sub-antenna of omnidirectional.Patent design downlink day The specific size of line, configuration, and modeling and simulating and performance evaluation are carried out to it using software, ground signal can be better meet and turned Hair subsystem detects receipts and forwarding demand to downlink signal, plays an important role to the normal operation of space base relayed communications enhancing system. Within the scope of whole system potential solution certain time, in specific region due to lack ground communication relay system caused by lead to Believe problem, is of great significance to the communication support under the scenes such as calamity danger rescue, operation on the sea, battlefield depopulated zone, anti-terrorism stability maintenance.

The utility model is realized in this way:

A kind of uplink/downlink antenna in space base relayed communications enhancing system, including monopole, sleeve and reflecting plate；The monopole Sub- main part is cylindrical, and taper closing in is arranged at lower part, is vertically provided with connection along the vertical direction in the lower end that taper closes up Portion, for reinforcing the connection of monopole and sleeve；Sleeve uses double-sleeve structure, is divided into inside and outside bilayer；The main part of monopole Divide and be inserted into outer layer sleeve, the interconnecting piece of monopole is inserted into inner layer sleeve；The lower end of sleeve is fixedly connected with reflecting plate.

Uplink/downlink antenna total height as described above is 49mm, monopole diameter 8mm, sleeve height 13.5mm, diameter 11mm, Reflect board diameter 200mm.

Uplink/downlink antenna greatest irradiation direction as described above is at ± 50 °, and antenna is in -180 °~+180 ° of Direction interval Middle actual gain can reach -20dB or more.

Port input return loss of the uplink/downlink antenna in 1.35GHz -1.85GHz as described above is respectively less than -10dB.

Maxgain value of the uplink/downlink antenna at required direction theta=± 60 ° as described above is 3.5dB, and minimum increases Benefit value is 2.4dB.

The beneficial effects of the utility model are:

The performance parameter of antenna is changed with frequency shift, and communication system working frequency range is wider, then to the property of antenna Energy parameter request is higher.Band downlink linear polarized antenna relative bandwidth BW ≈ 31% needs antenna to have good broadband special Property, and it is required to provide good impedance matching.For the demand, the sleeve single-stage with preferable broadband character is devised Sub-antenna is as uplink/downlink antenna.Further, since frequency conversion equipment field communication device distance is close, and it is little to antenna direction demand, it needs It wants antenna configuration as simple as possible, small in size, turns after the reception and frequency conversion for completing signal on portable converter plant can be placed in Hair.The sleeve monopole antenna of this patent design is small in size, and special in the radiation characteristic of required frequency range all angles, port match Property, gain be able to satisfy application demand, solve forwarding problems after downstream signal reception and frequency conversion.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the uplink/downlink antenna in the space base relayed communications enhancing system of the utility model；

Fig. 2 is the monopole structural schematic diagram of the uplink/downlink antenna in the space base relayed communications enhancing system of the utility model；

Fig. 3 is that the sleeve of the uplink/downlink antenna in the space base relayed communications enhancing system of the utility model and reflection board structure show It is intended to；

Fig. 4 be the uplink/downlink antenna in the space base relayed communications enhancing system of the utility model working frequency be 1.6GHz when Antenna radiation characteristics schematic diagram；

Fig. 5 is that the antenna port matching properties of the uplink/downlink antenna in the space base relayed communications enhancing system of the utility model show It is intended to；

Fig. 6 is the main frequency point of the uplink/downlink antenna in the space base relayed communications enhancing system of the utility model in theta= Gain curve at ± 60 °.

Wherein: 1. monopoles, 2. sleeves, 3. reflecting plates.

Specific embodiment

The utility model is described further with reference to the accompanying drawings and examples.

It is by aerial signal forwarding subsystem and ground signal forwarding point based on the space base relayed communications enhancing system that skill is detectd Two parts of uniting form, and wherein the former realizes aerial load and forwards to the frequency conversion for detecing receipts and L frequency band signals of VHF frequency band signals, The latter realizes ground installation and forwards to the reception of L frequency band signals and the frequency conversion of VHF frequency band signals.

In order to solve the problems, such as isolation between transmitting and receiving antenna in air platform relay load, it is ensured that without significantly with frequency between receiving and transmitting signal Interference.Antenna is divided into the uplink antenna in aerial signal forwarding subsystem and is located at ground signal by patent forwards subsystem Uplink/downlink antenna two parts.It is calculated according to relative bandwidth BW=(fh-fl)/f0 it is found that band downlink linear polarized antenna opposite band To realize the impedance matching in wider frequency segment limit the transmitting-receiving of two frequency band signals is effectively performed, on ground in wide BW ≈ 31% Subset use sleeve monopole antenna, antenna structure as shown in Figure 1, Figure 2 and Figure 3.

The utility model devises the sleeve antenna that a kind of working frequency range is located at 1.35GHz -1.85GHz, which is located at Ground signal forwards on the portable frequency translating transponder of subsystem.The antenna is optimized, optimization aft antenna total height is 49mm, monopole diameter 8mm, sleeve height 13.5mm, diameter 11mm reflect board diameter 200mm.Antenna simulation result such as Fig. 4 It is shown.

The antenna radiation characteristics schematic diagram that Fig. 4 is working frequency when being 1.6GHz, wherein abscissa is the deflection of antenna, Ordinate is actual gain (ratio of radiant power and port incident power) of the antenna in the direction.It can be seen by simulation result Out, the antenna greatest irradiation direction is at ± 50 °, and antenna actual gain in the Direction interval of (- 180 °~+180 °) can reach More than to -20dB, meet station telecommunication to the basic gain requirements of antenna.

Fig. 5 is port match characteristic schematic diagram, be can be seen that by simulation result, which exists

Port input return loss when 1.35GHz -1.85GHz is respectively less than -10dB (voltage standing wave ratio < 3.5), can be full Requirement of the sufficient station telecommunication to corresponding band return loss, but the reflection coefficient of low-frequency range needs to be advanced optimized.

As seen from Figure 6, in required working frequency range (1.35GHz -1.85GHz) range, the antenna is in required direction Maxgain value when (theta=± 60 °) is about 3.5dB, and minimum gain value is about 2.4dB, due to carrying out link budget When, space base relays the antenna of two subsystems of enhancing system according to 0dBi value, therefore Antenna Design gain effect can meet ground The transmitting-receiving demand of face frequency translating transponder.

The performance parameter of antenna is changed with frequency shift, and communication system working frequency range is wider, then to the property of antenna Energy parameter request is higher.Band downlink linear polarized antenna relative bandwidth BW ≈ 31% needs antenna to have good broadband special Property, and it is required to provide good impedance matching.For the demand, the sleeve single-stage with preferable broadband character is devised Sub-antenna is as uplink/downlink antenna.Further, since frequency conversion equipment field communication device distance is close, and it is little to antenna direction demand, it needs It wants antenna configuration as simple as possible, small in size, turns after the reception and frequency conversion for completing signal on portable converter plant can be placed in Hair.The sleeve monopole antenna of design is small in size, and the radiation characteristic in required frequency range all angles, port match characteristic, increasing Benefit is able to satisfy application demand, solves forwarding problems after downstream signal reception and frequency conversion.

It is explained in detail above in conjunction with implementation method of the embodiment to the utility model, but the utility model and unlimited In above-described embodiment, within the knowledge of a person skilled in the art, the utility model can also not departed from Various changes can be made under the premise of objective.The content being not described in detail in the utility model specification can use existing skill Art.

Claims (5)

1. the uplink/downlink antenna in a kind of space base relayed communications enhancing system, it is characterised in that: it includes monopole (1), sleeve (2) With reflecting plate (3)；Monopole (1) main part is cylindrical, and taper closing in is arranged at lower part, in the lower end edge that taper closes up Vertical direction is vertically provided with interconnecting piece, for reinforcing the connection of monopole (1) Yu sleeve (2)；Sleeve (2) is using double sleeve knots Structure is divided into inside and outside bilayer；The main part of monopole (1) is inserted into outer layer sleeve, and the interconnecting piece of monopole (1) is inserted into In inner layer sleeve；The lower end of sleeve (2) is fixedly connected with reflecting plate (3).

2. the uplink/downlink antenna in space base relayed communications enhancing system according to claim 1, it is characterised in that: under described Row antenna total height is 49mm, monopole (1) diameter 8mm, sleeve (2) height 13.5mm, diameter 11mm, reflecting plate (3) diameter 200mm。

3. the uplink/downlink antenna in space base relayed communications enhancing system according to claim 1, it is characterised in that: under described Row antenna greatest irradiation direction at ± 50 °, and antenna actual gain in -180 °~+180 ° of Direction interval can reach - 20dB or more.

4. the uplink/downlink antenna in space base relayed communications enhancing system according to claim 1, it is characterised in that: under described Port input return loss of the row antenna in 1.35GHz -1.85GHz is respectively less than -10dB.

5. the uplink/downlink antenna in space base relayed communications enhancing system according to claim 1, it is characterised in that: under described Maxgain value of the row antenna at required direction theta=± 60 ° is 3.5dB, minimum gain value 2.4dB.