CN202275942U - Camera - Google Patents

Abstract

The utility model relates to a camera which comprises a metamaterial antenna, a signal processing module and an image sensor, wherein the metamaterial antenna comprises a dielectric substrate, a feeding point arranged on one surface of the dielectric substrate, a feeder line connected with the feeding point, and a metal structure, wherein the feeder line is mutually coupled with the metal structure; the image sensor is used for taking image information and converting the image information to an electric signal; the signal processing module is used for processing the electric signal and generating result information; and the metamaterial antenna is used for transmitting the result information comprising video and audio in an electromagnetic wave form. According to the camera disclosed by the utility model, through the metamaterial antenna arranged outside or inside the camera, audio and video signals are transmitted to computer storage equipment at high speed, ultra-wide band and high volume in the wireless way, and the cost of transmitting signals in a wired mode, of the camera, is reduced.

Description

Camera

Technical field

The utility model relates to picture pick-up device, especially relates to a kind of wireless camera.

Background technology

Camera (CAMERA) is called camera computer again, and computer eye etc. are a kind of video input apparatus, are applied to video conference widely, aspects such as tele-medicine and monitoring in real time.Common people also can be each other has image at network, the talk and the communication of sound is arranged through camera.

Camera is divided into digital camera and two big types of simulation cameras.Digital camera can convert the analog video signal that video capture device produces to digital signal, and then it is stored in the computer.The vision signal that captures of simulation camera must be passed through specific video and caught card analog signal conversion is become figure pattern, and just can be transformed on the computer after compressing and use.Digital camera can directly be caught image, passes in the computer through string, parallel port or USB interface then.Yet; These cameras all need be connected with computer through wired mode; Be used in particular for the security monitoring camera, need to dispose messy cabling so that vision signal is in time transmitted computer equipment, in case if these messy cablings are cut off or certain interface comes off; Cause vision signal to be stored in the computer equipment, and these have wired camera inconvenient installation.

Antenna is as the radiating element and the receiving device of radio frequency signal, and its operating characteristic will directly influence the service behaviour of whole electronic system.Yet important indicators such as the size of traditional antenna, bandwidth, gain have but received the restriction (gain margin under the fixed dimension, bandwidth limit etc.) of basic physical principle.The basic principle of these index limit makes the miniaturization technology difficulty of antenna considerably beyond other device, and because the complexity of the electromagnetic field analysis of radio-frequency devices, approaching these limiting values all becomes huge technological challenge.

The utility model content

In order to solve the problem that exists in the existing camera; The utility model provides a kind of wireless camera; Through using high performance ultra material built-in aerial technology, under the prerequisite that satisfies the camera performance requirement, realize built-inization of antenna, the utility model adopts following technical scheme:

A kind of camera comprises ultra material antenna, signal processing module and imageing sensor, and said ultra material antenna comprises a medium substrate and the distributing point, the feeder line that is connected with said distributing point and the metal structure that are arranged at said medium substrate one surface; Said feeder line and said metal structure intercouple, and said imageing sensor is used for pickup image information and converts the signal of telecommunication into; Signal processing module is used to handle the said signal of telecommunication and the information that bears results, and said ultra material antenna is used for the said object information of looking audio frequency that comprises is propagated with the electromagnetic wave form.

Further, said metal structure is that sheet metal forms through engraving out the groove topological structure.

Further, said ultra material antenna also comprises ground unit, the said ground unit said distributing point both sides that distribute symmetrically; Said ground unit is provided with several metallized through holes.

Further, said ultra material antenna also comprises one with reference to ground, said with reference to ground comprise be positioned at said medium substrate relative two lip-deep first with reference to unit, ground and second with reference to the unit, ground, said first makes an end of said feeder line form microstrip line with reference to the unit, ground.

Further, the said first reference unit, ground and second is electrically connected with reference to the unit, ground each other.

Further, said medium substrate is provided with the number of metal through hole, and unit, the said first reference ground is realized being electrically connected through said plated-through hole with reference to the unit, ground with said second.

Further, unit, the said first reference ground is provided with the first metal covering unit and the second metal covering unit of mutual electrical connection, and an end position of said first metal covering unit and said feeder line is relative, makes an end of said feeder line form said microstrip line; Unit, the said second reference ground is provided with the 3rd metal covering unit, and said the 3rd metal covering unit is relative with the said second metal covering cell position.

Further, said medium substrate is positioned at the said second metal covering unit and place, said the 3rd metal covering unit offers the number of metal through hole, and the said second metal covering unit is electrically connected through said plated-through hole with said the 3rd metal covering unit.

Further; Unit, the said second reference ground also comprises the 4th metal covering unit; Said the 4th metal covering unit is positioned at a side of said feeder line one end; And be positioned on the bearing of trend of said feeder line, the said first metal covering unit is electrically connected through said plated-through hole with said the 4th metal covering unit.

Further, the resonance band of said ultra material antenna comprises 2.4GHz-2.49GHz and 5.72GHz-5.85GHz at least.

Relative prior art; The camera of the utility model adopts ultra material antenna built-in; Yet the design ultra material antenna of electromagnetic wave resonance of a wave band, two or more different-wavebands of sening as an envoy to based on ultra material antenna technology; Determine the physical size of the metal structure size of this antenna volume not limited by the physical length of half-wavelength, can go out corresponding antenna, satisfy wireless telecommunications system miniaturization, the built-in demand of antenna according to the size design of camera own.In addition, yet can realize that above-mentioned wireless mode is sent to video/audio signal high speed, ultra broadband, big capacity in the computer memory device, the reduction camera adopts the cost of wired mode transmission signals.

Description of drawings

Fig. 1 is the module map of camera;

Fig. 2 is the front view of antenna first execution mode in the utility model camera;

Fig. 3 is an antenna rearview shown in Figure 2;

Fig. 4 is the antenna first execution mode S parameters simulation figure of the utility model;

Fig. 5 is the front view of antenna second execution mode in the utility model camera;

Fig. 6 is the front view of antenna the 3rd execution mode in the utility model camera;

Fig. 7 is the metal structure enlarged drawing on second and third execution mode of the utility model antenna;

Fig. 8 is the antenna first execution mode S parameters simulation figure of the utility model;

Fig. 9 is that second and third execution mode of the utility model operates in 2.4,2.44, E direction far field simulation result figure during 2.48GHz;

Figure 10 is that second and third execution mode of the utility model operates in 2.4,2.44, H direction far field simulation result figure during 2.48GHz;

Figure 11 is that second and third execution mode of the utility model operates in 5.725,5.8, E direction far field simulation result figure during 5.85GHz;

Figure 12 is that second and third execution mode of the utility model operates in 5.725,5.8, H direction far field simulation result figure during 5.85GHz.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model camera is done a step explanation.

Seeing also Fig. 1, is the module map of the camera in the utility model.Camera 100 comprises ultra material antenna 10, signal processing module 11 and imageing sensor 12.Said imageing sensor 12 is used for pickup image information and converts the signal of telecommunication into; Signal processing module 11 is used to handle the said signal of telecommunication and the information that bears results, and said ultra material antenna 10 is used for the said object information of looking audio frequency that comprises is propagated with the electromagnetic wave form.In the utility model, said camera 100 includes but not limited to monitoring camera, watch-dog, high definition camera, infrared rig camera etc.Above-mentioned through wireless mode output video/audio signal, greatly save various video interface costs, thereby can reduce the cost that the wired mode of camera inserts.

Antenna is based on the artificial electromagnetic material art designs and forms in the utility model camera; Artificial electromagnetic material is meant the topological metal structure of sheet metal being engraved into given shape; And the topological metal structure of said given shape is arranged on certain dielectric constant and the magnetic permeability base material and the equivalent extraordinary electromagnetic material of processing and manufacturing, its performance parameter depends primarily on the topological metal structure of the given shape of its sub-wavelength.In resonance band, artificial electromagnetic material embodies the dispersion characteristics of height usually, in other words, the impedance of antenna, holds perception, equivalent dielectric constant and magnetic permeability along with violent variation can take place frequency.Thereby can adopt the artificial electromagnetic material technology that the fundamental characteristics of above-mentioned antenna is transformed, the medium substrate that makes metal structure depend on it has been formed a highly dispersed extraordinary electromagnetic material equivalently, thereby realizes the new antenna that radiation characteristic is abundant.Below introduce in detail the several embodiments of using ultra material antenna 10 in the camera:

First execution mode

Please consult Fig. 2 and Fig. 3 in the lump; Ultra material antenna 10 comprises medium substrate 1, metal structure 2, feeder line 3 and reference ground 41,42; Said medium substrate 1 is rectangular tabular, and it can be processed by materials such as high molecular polymer, pottery, ferroelectric material, ferrite material or ferromagnetic materials.In the present embodiment, the material of said medium substrate 1 adopts glass material (FR4) to process, thereby not only cost is low, and can guarantee in the different working frequency, to keep good antenna operating characteristic.

Said metal structure 2, feeder line 3 and place respectively on the two opposite surfaces of said medium substrate 1 with reference to ground 41,42; Said metal structure 2, feeder line 3 and with reference to ground 41,42 and the ultra material antenna of said medium substrate 1 formation; The performance of said ultra material antenna depends on said metal structure 2; In resonance band; Ultra material embodies the dispersion characteristics of height usually; Be its impedance, hold perception, equivalent dielectric constant and magnetic permeability, thereby, just make said metal structure 2 form a highly dispersed extraordinary electromagnetic material equivalently according to Lorentz material resonances model with medium substrate 1 through changing the fundamental characteristics of said metal structure 2 and medium substrate 1 along with violent variation can take place frequency.

See also Fig. 4, the working frequency range of the ultra material antenna in the present embodiment is 2.4GHZ～2.49GHZ and 5.72GHZ～5.85GHZ, and the gain of above-mentioned this two frequency range can reach 3.58dBi and 3.14dBi respectively.It is understandable that it is 2.4GHZ～2.49GHZ frequency range, i.e. single-band antenna that 10 response frequencies of ultra material antenna can be set.

Said feeder line 3 is arranged on a side of said metal structure 2, and extends along the length direction of said metal structure 2, and itself and said metal structure 2 intercouple, and wherein, the bending of an end of said feeder line 3 extends to said metal structure 2 ends one side.In addition; Embed the capacitive electronic component as required in the space between said feeder line 3 and metal structure 2; Regulate the signal coupling between feeder line 3 and the metal structure 2 through embedding the capacitive electronic component; By formula:

can know square being inversely proportional to of size and operating frequency of capacitance; So when the operating frequency that needs is when hanging down operating frequency, can realize through suitable embedding capacitive electronic component.The capacitance scope of the capacitive electronic component that adds is usually between 0-2pF, but the capacitance that embeds along with the variation of operating frequency of antenna also possibly exceed the scope of 0-2pF.

Said reference ground 41,42 is positioned at a side of said feeder line 3, makes an end of the said metal structure of being positioned at of said feeder line 32 ends form microstrip line 31.In the present embodiment, said with reference to ground comprise first with reference to unit 41, ground and second with reference to unit 42, ground, said first lays respectively at relative two surfaces of said medium substrate 1 with reference to unit 41, ground and second with reference to unit 42, ground.Unit 41, the said first reference ground is provided with the first metal covering unit 411 and the second metal covering unit 412 of mutual electrical connection.Unit 42, the said second reference ground is positioned at the same side of said medium substrate 1 with said feeder line 3, and is provided with the 3rd metal covering unit 421 and the 4th metal covering unit 422.

The said first metal covering unit 411 is relative with said feeder line 3 positions, makes an end of the said metal structure of being positioned at of said feeder line 32 ends form said microstrip line 31, and promptly said is virtual ground with reference to ground.The said second metal covering unit 412 is relative with 421 positions, said the 3rd metal covering unit.Said the 3rd metal covering unit 421 is positioned at an end of said metal structure 2, and said the 3rd metal covering unit 421 is rectangular panel-like, and identical with the bearing of trend of said feeder line 3.Said medium substrate 1 is positioned at the said second metal covering unit 412 and 421 places, said the 3rd metal covering unit offer number of metal through hole 5, and the said second metal covering unit 412 is electrically connected through said plated-through hole 5 with said the 3rd metal covering unit 421.

Said the 4th metal covering unit 422 is positioned at a side of said feeder line 3 one ends, and is positioned on the bearing of trend of said feeder line 3.Said medium substrate 1 is positioned at the said first metal covering unit 411 and 422 places, said the 4th metal covering unit offer number of metal through hole 5, and the said first metal covering unit 411 is electrically connected through said plated-through hole 5 with said the 4th metal covering unit 422.End through the first metal covering unit 411 and said feeder line 3 forms said microstrip line 31, thereby can reduce external signal the signal that on said feeder line 3, transmits is disturbed, and improves antenna gain, realizes impedance matching preferably, saves material, and cost is low.Pass through position setting cleverly between 411 to the 4th metal covering unit 422, the said first metal covering unit, thereby take less space with making said reference, just realize bigger area.In addition, through said plated-through hole 5 is set, thereby can further improve said area with reference to ground.

In sum, topological form and the layout said microstrip line 31 of the ultra material antenna 10 of the utility model through critically controlling metal structure 2, the effective dielectric constant and the magnetic permeability that needing to obtain distribute; Make antenna can in working frequency range, realize impedance matching preferably, accomplish power conversion expeditiously, and obtain desirable radiation pattern; It is little that it takies volume, low to environmental requirement, and gain is high; Applied range, the built-in or external antenna of suitable camera.

Second execution mode

As shown in Figure 5, be the structural representation of the ultra material antenna 10 of the utility model embodiment.Ultra material antenna 10 in the present embodiment comprises medium substrate 7 and is arranged on the distributing point 5 on the medium substrate 7, the feeder line 4 that is connected with this distributing point 5, the metal structure 6 of plane tabular.Wherein, feeder line 4 intercouples with metal structure 6; Metal structure 6 is that sheet metal forms through engraving out groove topological structure 61; Remove the material of groove topological structure 61 correspondences when engraving; Remaining sheet metal is metal structure 6, after engraving out groove topological structure 61, demonstrates the metal routing 62 that is included in the metal structure 6 on the sheet metal; The spacing of adjacent slot is the width of metal routing 62 in the groove topological structure 61, and the groove width of groove topological structure 61 equates with the width of metal routing 62, and is 0.15mm; Medium substrate 7 can be processed by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material, preferably, processes by macromolecular material, and can be macromolecular materials such as FR-4, F4B particularly.

In the present embodiment, metal structure 6 is axisymmetric plane tabular.Wherein metal structure 6 is processed for copper or ag material.Be preferably copper, cheap, conduct electricity very well.In order to realize better impedance matching, metal structure 6 also can be copper and silver combination.

See also Fig. 6, be the utility model the 3rd execution mode front view, the 3rd execution mode and the difference of second execution mode are also to comprise ground unit 8, and ground unit 8 is provided with the through hole 81 of number of metalization; Ground unit 8 said distributing point 5 both sides that distribute symmetrically, the selection of medium substrate 7 is identical with embodiment 1.Shown in Figure 7 is the enlarged drawing of the metal structure of second execution mode and the 3rd execution mode.Be that signal feed-in mode can have multiple between feeder line 4 and the metal structure 6 with being appreciated that.Said feeder line 4 directly links to each other with said metal structure 6; And said feeder line 4 can be positioned at the optional position on the metal structure 6 with the connecting point position that links to each other of metal structure 6.The end that feeder line 4 adopts the encirclement mode to be arranged at said metal structure 6 peripheries and feeder line 4 is arranged at metal structure 6 peripheral optional positions.

Present embodiment utilizes the characteristic of artificial electromagnetic material; Be employed in the mode of engraving into metal structure on the sheet metal; The common electromagnetic material of forming an effective dielectric constant according to the chromatic dispersion of Lorentz lorentz's material resonances model of the medium substrate that makes metal structure and depended on metal structure, thus design the shake antenna of frequency range of multi resonant.In this execution mode; Antenna shown in second execution mode and the 3rd execution mode makes 2.4GHz-2.49GHz and two frequency range electromagnetic waves of 5.72GHz-5.85GHz resonance; The length of metal structure 6 and widely can do any adjustment according to the communication apparatus organization distribution; But metal structure 6 planforms keep with present embodiment in consistent getting final product; This unipole antenna can be used for the communication apparatus of single-frequency 2.4GHz-2.49GHz or 5.72GHz-5.85GHz frequency range, also can be used for the camera equipment of double frequency 2.4GHz-2.49GHz and 5.72GHz-5.85GHz frequency range.

Be illustrated in figure 8 as the S parameters simulation figure of the utility model second execution mode and the 3rd execution mode; The antenna that the figure shows second execution mode and the 3rd execution mode has respectively at 2.4GHz and 5.8018GHz-loss of 15.426dB and-19.184dB; In desired 2.4GHz-2.49GHz of the utility model and 5.72GHz-5.85GHz frequency band, all have-loss below the 10dB; Show that the utility model antenna can work separately in 2.4GHz-2.49GHz or 5.72GHz-5.85GHz frequency band; Also can in 2.4GHz-2.49GHz and 5.72GHz-5.85GHz frequency band, work simultaneously, and satisfy in the camera requirement ultra material antenna 10.

Fig. 9, Figure 10, Figure 11 and Figure 12 show respectively that the utility model second execution mode and the ultra material antenna 10 of the 3rd execution mode operate in 2.4,2.44, when 2.48GHz and 5.725,5.8,5.85GHz respectively at vertical plane (E-Plane) and horizontal plane (H-Plane) direction far field simulation result figure, the polarization effect of ultra material antenna that in this result, can observe the utility model is not second to existing antenna and meet application standard.

In the utility model,,, can adopt various manufactures as long as satisfy the design principle of the utility model about the processing and manufacturing of ultra material antenna 10.Prevailing method is to use the manufacturing approach of all kinds of printed circuit board (PCB)s (PCB), as the PCB that covers copper makes the processing request all can satisfy the utility model.Remove this processing mode, can also introduce other manufacturing process according to the needs of reality, but like the flexible PCB processing of conductive silver paste printing ink processing mode, all kinds of deformation devices, the processing mode of iron plate antenna and the processing mode of iron plate and PCB combination.Wherein, iron plate and PCB combination processing mode is meant that the accurate processing that utilizes PCB accomplishes the processing of groove topological structure, accomplishes other slave part with iron plate.Owing to adopt cheaply that copper product forms said metal structure 6, therefore expose in the air oxidizedly easily and ultra material antenna 10 resonance frequency shifts or performance are sharply descended, so the unipole antenna surface is provided with nonmetallic anti-oxidation film.Because the main performance of the utility model all concentrates on the design of metal structure 6 groove topological structures 61, therefore, the lead-in wire of feeder line 4 is less relatively to the radiation frequency influence of ultra material antenna 10.Based on these characteristics, ultra material antenna 10 can be placed in any position of system, the complexity of the installation testing of simplification flexibly.

Combine accompanying drawing that the embodiment of the utility model is described above; But the utility model is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under the enlightenment of the utility model; Not breaking away under the scope situation that the utility model aim and claim protect, also can make a lot of forms, these all belong within the protection of the utility model.

Claims (10)

1. camera; It is characterized in that; Comprise ultra material antenna, signal processing module and imageing sensor, said ultra material antenna comprises a medium substrate and the distributing point, the feeder line that is connected with said distributing point and the metal structure that are arranged at said medium substrate one surface; Said feeder line and said metal structure intercouple, and said imageing sensor is used for pickup image information and converts the signal of telecommunication into; Signal processing module is used to handle the said signal of telecommunication and the information that bears results, and said ultra material antenna is used for the said object information of looking audio frequency that comprises is propagated with the electromagnetic wave form.

2. camera according to claim 1 is characterized in that, said metal structure is that sheet metal forms through engraving out the groove topological structure.

3. camera according to claim 1 is characterized in that, said ultra material antenna also comprises ground unit, the said ground unit said distributing point both sides that distribute symmetrically; Said ground unit is provided with several metallized through holes.

4. camera according to claim 1; It is characterized in that; Said ultra material antenna also comprises one with reference to ground; Said with reference to ground comprise be positioned at said medium substrate relative two lip-deep first with reference to unit, ground and second with reference to the unit, ground, said first makes an end of said feeder line form microstrip line with reference to the unit, ground.

5. camera according to claim 4 is characterized in that: the said first reference unit, ground and second is electrically connected with reference to the unit, ground each other.

6. camera according to claim 5 is characterized in that: said medium substrate is provided with the number of metal through hole, and unit, the said first reference ground is realized being electrically connected through said plated-through hole with reference to the unit, ground with said second.

7. according to claim 4 or 5 or 6 described cameras; It is characterized in that: unit, the said first reference ground is provided with the first metal covering unit and the second metal covering unit of mutual electrical connection; One end position of said first metal covering unit and said feeder line is relative, makes an end of said feeder line form said microstrip line; Unit, the said second reference ground is provided with the 3rd metal covering unit, and said the 3rd metal covering unit is relative with the said second metal covering cell position.

8. camera according to claim 7; It is characterized in that: said medium substrate is positioned at the said second metal covering unit and place, said the 3rd metal covering unit offers the number of metal through hole, and the said second metal covering unit is electrically connected through said plated-through hole with said the 3rd metal covering unit.

9. camera according to claim 7; It is characterized in that: unit, the said second reference ground also comprises the 4th metal covering unit; Said the 4th metal covering unit is positioned at a side of said feeder line one end; And be positioned on the bearing of trend of said feeder line, the said first metal covering unit is electrically connected through said plated-through hole with said the 4th metal covering unit.

10. according to each described camera of claim 1-9, it is characterized in that the resonance band of said ultra material antenna comprises 2.4GHz-2.49GHz and 5.72GHz-5.85GHz at least.

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