CN203707323U - Double-frequency microstrip antenna of wireless capsule endoscope - Google Patents
Double-frequency microstrip antenna of wireless capsule endoscope Download PDFInfo
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- CN203707323U CN203707323U CN201420043168.6U CN201420043168U CN203707323U CN 203707323 U CN203707323 U CN 203707323U CN 201420043168 U CN201420043168 U CN 201420043168U CN 203707323 U CN203707323 U CN 203707323U
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Abstract
The utility model discloses a double-frequency microstrip antenna of a wireless capsule endoscope. The microstrip antenna is arranged on the capsule outer wall of the wireless capsule endoscope and is characterized in that the microstrip antenna comprises a feeder end, an outer double-square-shaped antenna portion and an inner double-square-shaped antenna portion, wherein the feeder end acts as an input end of the microstrip antenna; the outer double-square-shaped antenna portion and the inner double-square-shaped antenna portion are electrically connected with the feeder end; the length of the outer double-square-shaped antenna portion corresponds to the full wavelength of the center frequency of a first expected frequency band; the length of the inner double-square-shaped antenna portion corresponds to the full wavelength of the center frequency of a second expected frequency band; the inner double-square-shaped antenna portion is partially embedded into the outer double-square-shaped antenna portion, and the center frequency of the first expected frequency band and the center frequency of the second expected frequency band are less than or equal to 1GHz; the internal part of the inner double-square-shaped antenna portion is embedded with a third antenna portion, and the third antenna portion is a plurality of double-square-shaped patches electrically connected with the inner double-square-shaped antenna portion and used for improving matching impedance of the feeder end. The antenna disclosed by the utility model is a capsule outer wall adhered antenna with the operating frequency being lower than 1GHz, provided with ultra wideband and small size, and suitable for operating in the small intestine of a human body.
Description
Technical field
The invention belongs to detecting detection technique field in body, be specifically related to a kind of double-frequency micro-strip antenna that is applied to Wireless capsule endoscope.
Background technology
The mankind can trace back to for 19th century by the history that endoscope is detected intracorporeal organ, and within 1806, Germany scientist Philipp Bozzini has invented the endoscope blank that uses candle light detecting human bladder and enteron aisle first.After this, different types of endoscope is (as gastroscope, in order to detect Gastric Diseases by Spraying; Sigmoidoscope, in order to detect enteron aisle pathology) by constantly development and improvement, detect in order to the illness that helps doctor to carry out live body digestive system to patient.
In the past twenty years, relevant science and technology has obtained development rapidly, and a kind of medical science auxiliary equipment that can be used for replacing gastroscope and Sigmoidoscope---the birth of Wireless capsule endoscope makes to detect stomach and enteric disorders simultaneously and may become.The difference of Wireless capsule endoscope and conventional endoscope is, doctor is without the scope with flexible pipe is inserted in patient body, and patient can keep normal activity and life.The capsule endoscope that can swallow for people, has reduced with its less volume the misery that conventional endoscope (with soft pipeline) is brought to patient largely; And the characteristic that it is convenient and healthy, has been subject to the approval of medical circle.
Wireless capsule endoscope is a kind of miniature electric Medical Devices of capsule appearance, and built-in LED(provides light source), the element such as imaging system (seizure image), multiple sensors, battery (power supply is provided), transmitter module and antenna (transmission and processing signals).The Wireless capsule endoscope being employed at present, as the M2A type capsule endoscope (being of a size of 11mm x27mm) of being researched and developed by Olympus pharmaceuticals, after being swallowed by human body, can continuous operation 7～8 hours, therebetween, can take pictures to digestive system with the speed of two frames per second, finally obtain approximately 50,000 colour pictures.Capsule shell is to be sealed by special biomaterial, can resist hydrochloric acid in gastric juice and powerful digestive ferment.After being swallowed by patient, capsule endoscope can be advanced at leisure by the traction of peristalsis of the digest tract or positioning control system, also can stop at aura position, and this provides effective detection methods for complete section of long small intestine of 5-7 rice.
But still there are problems in current capsule endoscope technology, the problem such as short such as picture quality is limited, transmission rate is lower, the energy content of battery is held time.And the most important condition overcoming the above problems is to have a antenna that meets reliable communication demand, improves transmission rate, not affected by metal battery case as far as possible.Its specific requirement is as follows:
The first, in order to make patient can not feel pain and discomfort when the swallowable capsule, and can normally excrete, the size of Wireless capsule endoscope should be as far as possible little, and this just requires the size of antenna also want little and can carry out proper communication.Be to be placed in capsule shells and be numbered at Chinese patent the wire-less endoscope capsule micro-band antenna device proposing in the patent of CN1851982A, although antenna size is less, but still occupied the space in capsule shells.
Second, the communication frequency of capsule antenna is larger, human body is more remarkable to electromagnetic absorption, to cause a large amount of energy to be absorbed by the body but not transfer to external reception antenna, thereby cause the radiation intensity of antenna and radiation efficiency all to reduce to some extent, therefore to select the microstrip antenna of communication frequency lower (lower than 1GHz).
The 3rd, in the time normally working, enter blind area for fear of antenna, make the direction of transmitting site and signal transmission there is independence, therefore require antenna to there is omni-directional, can transmit to normally work any position in human body.
The 4th, in body, capsule is communicated by letter in upper certain the given modulation system (as ASK) that adopts of given certain frequency range (as 500MHz) with external portable wireless transceiver device, in order to reach the medical image that in transmission multiframe capsule per second, imageing sensor collects, data bit rate conventionally will be more than 2Mbps, and antenna must meet the demand of reliable communication.
The 5th, consider that human body environment can produce certain impact to antenna performance, and the signal center frequency skew that in communication mechanism, the signal spectrum bandwidth of concrete modulation system and integrated circuit technology deviation and other effects are brought, this just requires capsule antenna to have certain impedance bandwidth.Meanwhile, Wireless capsule endoscope adopts powered battery, in order to reduce energy consumption, will improve image transmitting speed, and this just requires the bandwidth of antenna wide as far as possible.
The 6th, Wireless capsule endoscope adopts powered battery, and its metal shell also can affect the characteristic of some type antenna; Consider Cost Problems, antenna should be convenient to processing and manufacturing, and lower to accuracy of manufacture requirement, this just requires antenna should be subject to the impact of capsule shells thickness and capsule shells radius less.At present, the antenna type in capsule endoscope has two kinds: the adherent antenna of three-dimensional antenna and capsule outer walls in capsule.Capsule internal antenna occupies space in capsule, has restricted the size of capsule shells; Centre frequency only has 260MHz lower than the frequency bandwidth of the adherent antenna of 1GHz capsule; Frequency bandwidth exceedes its centre frequency of adherent antenna of 300MHz all higher than 1GHz.The present invention therefore.
Summary of the invention
The object of the invention is to provide a kind of double-frequency micro-strip antenna that is applied to Wireless capsule endoscope, solved microstrip antenna that in prior art, Wireless capsule endoscope uses and had the technical problems such as to take that space in capsule, communication frequency are high, battery is held time short.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
Be applied to a double-frequency micro-strip antenna for Wireless capsule endoscope, described microstrip antenna is attached in the capsule outer walls of Wireless capsule endoscope, it is characterized in that described microstrip antenna comprises:
Feeder line end, as the input of microstrip antenna;
Outer hollow antenna part and interior hollow antenna part with the electric connection of feeder line end; Its China and foreign countries' hollow antenna part, its length is long corresponding to the all-wave of the centre frequency of the first desired frequency band; Interior hollow antenna part, its length is long corresponding to the all-wave of the centre frequency of the second desired frequency band; Interior hollow antenna part is embedded hollow antenna part inside outside, and the centre frequency of the first desired frequency band and the second desired frequency band is all less than or equal to 1GHz;
Described interior hollow antenna part inside is embedded third antenna part, and described third antenna part is some groups of hollow pasters that are electrically connected with interior hollow antenna part, for improving the matched impedance of feeder line end.
Preferred technical scheme is: the centre frequency of described the first desired frequency band is 158MHz-958MHz, and the centre frequency of described the second desired frequency band is 310MHz-710MHz.
Preferred technical scheme is: the centre frequency of described the first desired frequency band is 558MHz, and the centre frequency of described the second desired frequency band is 510MHz.
Preferred technical scheme is: the length of described feeder line end is 1mm, and third antenna part is four groups of hollow pasters that are electrically connected with interior hollow antenna part.
Preferred technical scheme is: the length of described feeder line end is 5.5mm, and third antenna part is two groups of hollow pasters that are electrically connected with interior hollow antenna part.
Preferred technical scheme is: described microstrip antenna also comprises the 4th antenna part, for as earth terminal, is electrically connected feeder line end.
Preferred technical scheme is: each antenna part of described microstrip antenna adopts to be made in the mode of bonding jumper, metal wire or the two combination.
Another object of the present invention is to provide a kind of described double-frequency micro-strip antenna that is applied to Wireless capsule endoscope to can be used for the transmitting of signal in Wireless capsule endoscope body.
The double-frequency micro-strip antenna that the present invention is applied to Wireless capsule endoscope belongs to the miniature antenna in wireless capsule endoscope system, because this antenna is paster microstrip antenna, when use, can stick in the capsule outer walls of Wireless capsule endoscope, solve the problem that Wireless capsule endoscope inner space takies.The double-frequency micro-strip antenna that the present invention is applied to Wireless capsule endoscope can be used as in human small intestine, is operated in the Miniaturized Microstrip Antennas of UHF section, ultra broadband, is applied to Wireless capsule endoscope, belongs to clinical medicine auxiliary equipment technical field.
The present invention is directed to the problems that propose in technical background, improved:
First, loop antenna in the Outer-Wall Loop Antenna for Ultrawideband Capsule Endoscope System document of being write by Sumin Yun etc., its centre frequency at 500MHz(lower than 1GHz), but its frequency bandwidth only has 260MHz.Technical solution of the present invention links together two different loop antennas of length, make it two approaching resonance frequencys that produce, increase the frequency bandwidth of whole antenna, this just provides the foundation for improving message transmission rate, the impact of the dielectric property of also having avoided human body Different Organs on antenna.
The second, the desired capsule shells radius of loop antenna is 5.5mm, and the desired capsule shells radius of antenna of the present invention is 5.3mm or 2.4mm, this has just reduced capsule size greatly, make it to be tending towards miniaturization, be more conducive to swallowing of patient, and can be applicable to the capsule endoscope of child form.
The 3rd, consider the impact of cost and capsule metal pair antenna, the antenna of technical solution of the present invention is subject to the impact of capsule shells radius and thickness less, thereby has reduced the requirement of production precision, has saved production cost.
The object of the invention is to improve defect based on antenna in prior art, providing can be for the adherent antenna of the capsule outer walls of Wireless capsule endoscope, its operating frequency lower than 1GHz, there is super bandwidth, size is less, be applicable to working in human small intestine.The microstrip antenna adopting have external form little, lightweight, make the advantages such as simple, cost is low and easy for installation, and the impacts of metallics on antenna performance such as battery have been got rid of in capsule in the shielding action of himself metal structure automatically.
The object of the invention is to improve the deficiency that capsule antenna in prior art exists, proposed operating frequency lower than 1GHz, there is the adherent antenna of capsule of super bandwidth.Microstrip antenna have external form little, lightweight, make the advantages such as simple, cost is low and easy for installation, and the impacts of metallics on antenna performance such as battery have been got rid of in capsule in the shielding action of himself metal structure automatically.The present invention is the requirement to antenna according to wireless capsule endoscope system, has proposed two and has made simple adherent antenna, occupies the space in capsule shells to reduce built-in helical antenna; A synthetic two loop antennas antenna is increased to the frequency bandwidth of antenna, to improve message transmission rate, and the impact of the dielectric property that can avoid Different Organs in human body on antenna; Designed antenna is subject to the impact of capsule shells radius and thickness less, can reach the effect that reduces production precision and cost.Therefore the two adherent antenna that, the present invention proposes can be advantageously applied to capsule endoscope system.
With respect to scheme of the prior art, advantage of the present invention is:
The present invention is the requirement to antenna according to wireless capsule endoscope system, has proposed for the adherent antenna of the capsule outer walls of Wireless capsule endoscope, to reduce built-in helical antenna and to occupy the space in capsule shells; A synthetic two loop antennas antenna is increased to the frequency bandwidth of antenna, to improve message transmission rate, and the impact of the dielectric property that can avoid Different Organs in human body on antenna; Designed antenna is subject to the impact of capsule shells radius and thickness less, can reach the effect that reduces production precision and cost.Therefore the adherent antenna that, the present invention proposes can be applied to capsule endoscope system better.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the structural representation of two adherent antenna of the present invention.Wherein example 1(a) be the dimensional structure figure of the antenna shown in Fig. 1 (a); Example 1(b) be the dimensional structure figure of the antenna shown in Fig. 1 (b).
Fig. 2 is the perspective view of two adherent antenna of the present invention.Wherein example 2(a) be the structural representation of the antenna shown in Fig. 1 (a); Example 2(b) be the structural representation of the antenna shown in Fig. 1 (b).
Fig. 3 is the return loss plot of adherent antenna of the present invention.Wherein example 3(a) be the return loss plot of the antenna shown in Fig. 1 (a); Example 3(b) be the return loss plot of the antenna shown in Fig. 1 (b).
Fig. 4 is the directional diagram of the antenna shown in adherent Fig. 1 of the present invention (a).Wherein example 4(a) be the xy-plane directional diagram in the time of 500MHz of the antenna shown in Fig. 1 (a); Example 4(b) be that the antenna shown in Fig. 1 (a) is yz-plane directional diagram at 500MHz.
Fig. 5 is the directional diagram of the antenna shown in adherent Fig. 1 of the present invention (b).Wherein example 5(a) be the xy-plane directional diagram in the time of 500MHz of the antenna shown in Fig. 1 (b); Example 5(b) be that the antenna shown in Fig. 1 (b) is yz-plane directional diagram at 500MHz.
Fig. 6 is the actual measurement performance plot of two antenna of the present invention.Wherein example 6(a) be test result and the simulation result comparison diagram of the antenna return loss shown in Fig. 1 (a); Example 6(b) be test result and the simulation result comparison diagram of the antenna return loss shown in Fig. 1 (b).
Wherein: 110 is feeder line end; 120 is outer hollow antenna part; 130 is interior hollow antenna part; 140 is third antenna part; 150 is the 4th antenna part.
Embodiment
Below in conjunction with specific embodiment, such scheme is described further.Should be understood that these embodiment are not limited to limit the scope of the invention for the present invention is described.The implementation condition adopting in embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally normal condition.
Embodiment 1～2 is applied to the double-frequency micro-strip antenna of Wireless capsule endoscope
As shown in Fig. 1 (a), the adherent antenna of capsule outer walls that this double-frequency micro-strip antenna that is applied to Wireless capsule endoscope is Wireless capsule endoscope, can be applicable on general Wireless capsule endoscope.Design is on the substrate of the wide 23mm of long 33mm, and the dielectric constant of substrate is 3.7, and copper thickness is 0.035mm, and the antenna shown in Fig. 1 (a) is placed in the manikin that a dielectric constant is 56, conductivity is 0.8S/m.In order to reduce the space taking in capsule shells, invented antenna is attached on capsule shells outer wall, obtain the antenna (as shown in Figure 2 (a) shows) under last use state.The capsule shells radius that the antenna of inventing requires is respectively 5.3mm.
In order further to reduce the size of microstrip antenna, adopt high dielectric constant.Antenna need be printed on thin film dielectrics and then be attached on capsule shell wall.The size of the required dielectric film of antenna is respectively the wide 23mm of 33mm; The dielectric constant of selected thin film dielectrics is 3.7.The paster (120 and 130) of the similar hollow that paster antenna is differed by two length forms, and the length of outer hollow antenna part (paster) 120 is longer, and its resonance frequency is lower; The length of interior hollow antenna part (paster) 130 is shorter, and its resonance frequency is higher.Thereby the bandwidth that has merged two different resonance frequencys at-10dB place increases bandwidth, to meet higher message transmission rate.As shown in Figure 3, the centre frequency of the antenna that the present invention proposes is 558MHz, and frequency bandwidth is respectively 800MHz(158MHz-958MHz).And paster 140 is designed to four little hollow pasters, in order to reduce the return loss of two different resonance frequencys intersections, thereby the return loss pad value in 300MHz left and right to the whole frequency band of 800MHz left and right, not only increased frequency bandwidth but also can improve the stability of actual performance, antenna any frequency in frequency band can normally be worked.Paster 140 can also regulate impedance to make antenna reach the effect of impedance matching simultaneously.
The matched impedance of general input is 50 Ω, but in reality, paster 120 and 130 is difficult to meet the demands, so can meet and carry out impedance matching requirement under different situations by changing the size of paster 140.Paster 110 is feeder line ends, and paster 150 is equivalent to ground connection, thereby completes the connection of feed end.
As shown in Fig. 1 (b), the adherent antenna of capsule outer walls that this double-frequency micro-strip antenna that is applied to Wireless capsule endoscope is Wireless capsule endoscope, can be used on child form Wireless capsule endoscope.Design is on the substrate of the wide 15mm of long 18mm, and the dielectric constant of substrate is 3.7, and copper thickness is 0.035mm, and the antenna shown in Fig. 1 (a) is placed in the manikin that a dielectric constant is 56, conductivity is 0.8S/m.In order to reduce the space taking in capsule shells, invented antenna is attached on capsule shells outer wall, obtain the antenna (as shown in Fig. 2 (b)) under last use state.The capsule shells radius that the antenna of inventing requires is 2.4mm.
Antenna shown in Fig. 1 (b) is less than the antenna shown in Fig. 1 (a) dimensionally, but centre frequency is lower than the antenna shown in Fig. 1 (a).Although the frequency bandwidth of the antenna shown in Fig. 1 (b) is less than the antenna shown in Fig. 1 (a), the desired capsule shells radius of the antenna shown in Fig. 1 (b) only has 2.4mm, is more conducive to swallowing of patient, also can be used for the capsule endoscope system of child form.
The paster (120 and 130) of the similar hollow that paster antenna is differed by two length forms, and the length of outer hollow antenna part (paster) 120 is longer, and its resonance frequency is lower; The length of interior hollow antenna part (paster) 130 is shorter, and its resonance frequency is higher.Thereby the bandwidth that has merged two different resonance frequencys at-10dB place increases bandwidth, to meet higher message transmission rate.As shown in Figure 3, the centre frequency of the antenna that the present invention proposes is 510MHz, and frequency bandwidth is respectively 265MHz(310MHz-710MHz).And paster 140 is designed to two little hollow pasters, it is the return loss pad value in order to reduce by two different resonance frequencys intersections, thereby in about 300MHz to the return loss of the whole frequency band of 600MHz left and right all lower than-10dB, increased frequency bandwidth, can make again antenna any frequency in frequency band normally to work, can also meet impedance matching simultaneously.The matched impedance of general input is 50 Ω, but in reality, paster 120 and 130 is difficult to meet the demands, so can meet the impedance matching requirement under different situations by the size that changes paster 140.Paster 110 is feeder line ends, and paster 150 is equivalent to ground connection, thereby completes the connection of feed end.
Meanwhile, for antenna can be used in child form capsule endoscope, need further reduce the size of microstrip antenna., the length of paster 220 and 230 is shortened not higher than 1GHz in the situation that in resonance frequency, the operating frequency of the antenna shown in Fig. 1 (b) is compared with the height of the antenna shown in Fig. 1 (a).But in order to guarantee that the antenna shown in Fig. 1 (b) also has wider frequency bandwidth, therefore the paster 240 of design is not regular rectangle, and has increased the length of paster 210, make it to increase the return loss pad value of antenna.Paster 210 is feeder line points, and paster 250 is equivalent to ground connection, thereby completes the connection of feeder line end.
In the time that the resonance frequency of capsule antenna is greater than 1GHz, human body is more remarkable to electromagnetic absorption, to cause a large amount of energy to be absorbed by the body but not transfer to external reception antenna, thereby cause the radiation intensity of antenna and radiation efficiency all to reduce to some extent, therefore the communication frequency of remote measurement in uncomfortable cooperation body.Therefore require the designed antenna resonant frequency will be lower than 1GHz, this have just caused the increase of effective antenna length, thereby has occupied larger capsule space.In order to save capsule space, so want the antenna in the be attached to capsule outer walls of design plane, to make full use of the space of capsule outer walls, can reduce like this operating frequency of antenna, can save again capsule space.
In order to keep the independence of transmitting site and signal transmission direction, the design in the whole bending of the present invention loop will be in tri-planes of xyz, so just can make (Figure 4 and 5) of antenna in xy plane and the basic Dou Shi of yz plane omnidirectional, so no matter peep where be positioned at human small intestine in capsule, can think external transmitting, transmit image data, so that doctor detects.
Because antenna is attached on capsule shell wall, need to consider the impact on capsule antenna of capsule shells radius and thickness.But the advantage of the antenna maximum of the present invention's design is exactly to be subject to the impact of capsule shells radius and thickness very little.When the variation of capsule shells radius from 5mm to 15mm, when the variation of capsule shells thickness from 0.5mm to 5mm(or 3.4mm), antenna is subject to the impact of capsule shells thickness and radius all very little, has so both reduced the requirement of antenna to production capsule shells precision, has reduced again production cost.
Because the antenna of design is subject to the impact of capsule shells radius and thickness less, so adopt the antenna shown in Fig. 1 (a) and the plane structure chart 1(a of the antenna shown in Fig. 1 (b)) shown in antenna and the antenna shown in Fig. 1 (b) test, and with simulation result contrast (Fig. 6).Adopt the chemical materials such as sugar, salt, water to configure the simulated human tissue liquid that required dielectric constant is 56, conductivity is 0.8S/m, and the antenna shown in the antenna shown in Fig. 1 making (a) and Fig. 1 (b) is placed in simulated human tissue liquid and is tested, the test result obtaining approaches simulation result: centre frequency is much the same, antenna bandwidth shown in Fig. 1 (a) is narrow compared with simulation result, but still belongs to ultra broadband; Antenna bandwidth shown in Fig. 1 (b) is wide compared with simulation result, is more conducive to signal and transmits and receives.
In sum, the invention solves the miniaturization of capsule antenna, saved the space in capsule shells, make it be applied to child form capsule endoscope; Be attached on capsule shell wall and be not subject to the impact of capsule shells thickness and radius, reduced the requirement of production precision and saved cost; Compared with traditional capsule antenna, the capsule antenna of the present invention's design has ultra broadband, has not only provided the foundation but also can avoid the dielectric property of human body Different Organs on the impact of antenna for improving message transmission rate, and this will have more using value.
Above-mentioned example is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformations that Spirit Essence does according to the present invention or modification, within all should being encompassed in protection scope of the present invention.
Claims (7)
1. be applied to a double-frequency micro-strip antenna for Wireless capsule endoscope, described microstrip antenna is arranged in the capsule outer walls of Wireless capsule endoscope, it is characterized in that described microstrip antenna comprises:
Feeder line end, as the input of microstrip antenna;
Outer hollow antenna part and interior hollow antenna part with the electric connection of feeder line end; Its China and foreign countries' hollow antenna part, its length is long corresponding to the all-wave of the centre frequency of the first desired frequency band; Interior hollow antenna part, its length is long corresponding to the all-wave of the centre frequency of the second desired frequency band; Interior hollow antenna part is embedded hollow antenna part inside outside, and the centre frequency of the first desired frequency band and the second desired frequency band is all less than or equal to 1GHz;
Described interior hollow antenna part inside is embedded third antenna part, and described third antenna part is some groups of hollow pasters that are electrically connected with interior hollow antenna part, for improving the matched impedance of feeder line end.
2. the double-frequency micro-strip antenna that is applied to Wireless capsule endoscope according to claim 1, the centre frequency that it is characterized in that described the first desired frequency band is 158MHz-958MHz, the centre frequency of described the second desired frequency band is 310MHz-710MHz.
3. the double-frequency micro-strip antenna that is applied to Wireless capsule endoscope according to claim 1, the centre frequency that it is characterized in that described the first desired frequency band is 558MHz, the centre frequency of described the second desired frequency band is 510MHz.
4. the double-frequency micro-strip antenna that is applied to Wireless capsule endoscope according to claim 1, the length that it is characterized in that described feeder line end is 1mm, third antenna part is four groups of hollow pasters that are electrically connected with interior hollow antenna part.
5. the double-frequency micro-strip antenna that is applied to Wireless capsule endoscope according to claim 1, the length that it is characterized in that described feeder line end is 5.5mm, third antenna part is 2 groups of hollow pasters that are electrically connected with interior hollow antenna part.
6. the double-frequency micro-strip antenna that is applied to Wireless capsule endoscope according to claim 1, is characterized in that described microstrip antenna also comprises the 4th antenna part, for as earth terminal, is electrically connected feeder line end.
7. according to the double-frequency micro-strip antenna that is applied to Wireless capsule endoscope described in claim 1 ~ 6 any one, it is characterized in that each antenna part employing of described microstrip antenna is made in the mode of bonding jumper, metal wire or the two combination.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420043168.6U CN203707323U (en) | 2014-01-23 | 2014-01-23 | Double-frequency microstrip antenna of wireless capsule endoscope |
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| CN201420043168.6U CN203707323U (en) | 2014-01-23 | 2014-01-23 | Double-frequency microstrip antenna of wireless capsule endoscope |
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| CN201420043168.6U Expired - Lifetime CN203707323U (en) | 2014-01-23 | 2014-01-23 | Double-frequency microstrip antenna of wireless capsule endoscope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904425A (en) * | 2014-01-23 | 2014-07-02 | 西交利物浦大学 | Dual-frequency microstrip antenna of wireless capsule endoscope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904425A (en) * | 2014-01-23 | 2014-07-02 | 西交利物浦大学 | Dual-frequency microstrip antenna of wireless capsule endoscope |
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