CN101005153A - Antenna apparatus - Google Patents

Abstract

The present invention provides a flat antenna apparatus which will not easily suffer wind pressure, has light weight, beautiful appearance and good feed voltage characteristic and is especially adapted to wireless microphone. The antenna apparatus (1A) is formed by mounting a yagi-uda antenna including various antenna elements (20) such as directors (20a-20c), an emitter (20d) and a reflector (20e) on a dielectric substrate (10) made of rigid materials. The various antenna elements (20 (20a-20e)) form various central parts of multiple parallel element forming parts (11 (11a-11e)) that are linked together by a main frame plate (12) in prescribed space, and form space parts (13 (13a-13d)) among the elements forming parts (11 (11a-11e)).

Description

Antenna assembly

Technical field

The antenna assembly that the present invention relates on dielectric base plate, form Yagi antenna (Yagi Antenna) and make, specifically, relate generally to the antenna assembly that is suitable for as the wireless microphone usefulness reception antenna that in the stage of indoor or outdoors or recording studio etc., uses.

Background technology

The antenna assembly that the present invention relates on dielectric base plate to form Yagi antenna and make specifically, relates generally to the antenna assembly that is suitable for as the wireless microphone usefulness reception antenna that uses in the stage of indoor or outdoors or recording studio etc.

Common Yagi antenna disposes each antenna element (antenna element) of director, reflector and the reflector made by metal bar in parallel to each other with the interval of regulation and makes, but in the last few years, for example in wireless local loop etc., used (for example with reference to patent documentation 1 (the open H11-177338 communique of Japan Patent), patent documentation 2 (Japan Patent discloses the 2005-142925 communique)) at Yagi antenna that each antenna element of configuration on the dielectric base plate forms plane.

In the prior art, this plane Yagi antenna is that the antenna body that will form on dielectric base plate is accommodated in the synthetic resin box body, and via being arranged on installation accessory in this synthetic resin box body with towards the mode of prescribed direction and be contained in to be arranged at and use on for example outdoor antenna back shaft.

But because be plane, so box body is subjected to the area of wind big, therefore when being subjected to high wind, the direction of antenna will change.Because the directive property of Yagi antenna is strong, so when the direction of antenna changed, the receiving sensitivity of electric wave descended, and causes communication failure through regular meeting.

Therefore, in the invention of in patent documentation 1, putting down in writing, be received in the box body and the enclosed type Yagi antenna that is provided with for the Yagi antenna that will on dielectric base plate, form, by there not being the part of antenna element in the Yagi antenna, in box body, be provided for the through hole that ventilates, thereby be not easy to suffer blast.

But, the plane Yagi antenna of making will on dielectric base plate, forming antenna element, be used under the situation of reception antenna of the wireless microphone that uses in the stage of indoor or outdoors for example or the recording studio etc., different with the purposes of above-mentioned wireless local loop or WLAN etc., some below needing to consider.

At first, because the frequency band that uses in wireless microphone is near 800MHz, therefore its reception antenna is more large-scale than the antenna of the middle for example a few GHz frequency bands that use such as above-mentioned WLAN, therefore when needs make it be not easy more to suffer blast than above-mentioned antenna of the prior art, in light weight for carrying is also required easily.

In addition, because will be arranged on the place that the eyes of the people on the stage etc. are seen easily,, but also to pay attention to outward appearance so receptivity just much less.Only so also not all right, because in recording studio etc., will be arranged on the height place of about people's height by support etc., thus probably can contact people's face etc., so its Security Countermeasures also necessitate.

Summary of the invention

Therefore, the object of the present invention is to provide a kind of antenna assembly, it is not easy to suffer blast, and is in light weight, and outward appearance is also attractive in appearance, even contact also safety with the people, and the feed characteristic is good, is particularly suitable for wireless microphone.

In order to solve above-mentioned problem, the invention is characterized in, the antenna assembly of making on the dielectric base plate of making by hard material, forming the Yagi antenna of each antenna element that contains director, reflector and reflector, above-mentioned dielectric base plate has above-mentioned each antenna element and forms a plurality of element formation portion that is parallel to each other with the interval of regulation, the middle body of above-mentioned a plurality of element formation portion links into an integrated entity by the main framing plate each other, and forms space part between above-mentioned a plurality of element formation portion.

By like this, contain director on the dielectric base plate of making by hard material, forming, the Yagi antenna of each antenna element of reflector and reflector and the antenna assembly made, each antenna element is linked into an integrated entity by the main framing plate each other with each middle body that the interval of regulation forms a plurality of element formation portion that is parallel to each other, and between each element formation portion, form space part, thereby eliminate the useless part of not bringing into play function as antenna as far as possible, by dielectric base plate is made herring-bone form, thereby realize lightweight significantly, and the dielectric constant that between each antenna element, has dielectric base plate hardly, make aspect of performance with in air, arrange the identical of metal antenna bar, can realize the raising of feed characteristic.

In addition, the invention is characterized in, originally be provided with the sky wire maintainer (antenna holder) that feed line connects the connector of usefulness and supports usefulness on one's body at above-mentioned dielectric base plate.By like this, need not adorn box body outward and just the dielectric base plate monomer can be installed in upward uses such as support.

As preferred mode, it is characterized in that above-mentioned dielectric base plate possesses the bridge part between the end that connects said elements formation portion.By like this, do not have outstanding part, even thereby the people contacted the danger that also can avoid injury etc.In addition, mechanical strength also is improved.

The invention is characterized in that the end of said elements formation portion is in the position termination roughly the same with the end of above-mentioned antenna element, the end face of said elements formation portion contacts with the space.By like this, exist length composition to bring the dielectric of bad influence hardly at the place, end of antenna element, so antenna element come work according to the length of design basically to it.

The invention is characterized in, above-mentioned director and above-mentioned reflector arrangement are on the one side of above-mentioned dielectric base plate, and above-mentioned transmitter configuration is on the another side of above-mentioned dielectric base plate, and above-mentioned reflector is connected usefulness with above-mentioned feed line connector connects by the printed wiring that forms on the another side of above-mentioned dielectric base plate.By like this, from reflector, the connector that feed line can be connected usefulness is configured in the end edge place as the dielectric base plate of reflector outer fix, and the degree of freedom of design has improved.

The invention is characterized in that the element of said elements formation portion formation face is covered by the electrical insulating property resin material at least.By like this, can dielectric base plate be used as the reception antenna that wireless microphone is used with the state that exposes that does not have box body, can on its coverage rate, print the name of for example manufacturer that is used to propagate etc. in addition.

Description of drawings

Fig. 1 shows the stereoscopic figure of an example of the antenna assembly of the 1st execution mode according to the present invention.

Fig. 2 shows the plane graph of formation of the one side of said antenna device.

Fig. 3 shows the plane graph of formation of the another side of said antenna device.

Fig. 4 is the A-A line profile of Fig. 2.

Fig. 5 shows the plane graph of the antenna assembly of the 2nd execution mode according to the present invention.

Fig. 6 shows the plane graph of the antenna assembly of the 3rd execution mode according to the present invention.

Embodiment

Several embodiments of the present invention is described to Fig. 6 below with reference to Fig. 1, but the present invention is not limited.Fig. 1 shows the stereoscopic figure according to an example of antenna assembly of the present invention, Fig. 2 shows the plane graph of formation of the one side of said antenna device, Fig. 3 shows the plane graph of formation of the another side of said antenna device, Fig. 4 is the A-A line profile of Fig. 2, and Fig. 5, Fig. 6 show the plane graph of other execution mode respectively.

Theantenna assembly 1A of the 1st execution mode according to the present invention at first is described referring to figs. 1 through Fig. 4.Thisantenna assembly 1A forms the plane Yagi antenna of making as director, reflector and the reflector of antenna element ondielectric base plate 10, making antenna element in this example is 5 elements.

That is, ondielectric base plate 10,3director 20a, 20b, 20c are set in parallel to each other, areflector 20d and areflector 20e with the interval of stipulating respectively.In addition, when explanation,, these elements are generically and collectively referred to as antenna element 20 there is no need to distinguish under the situation of director, reflector and reflector.

In this example,dielectric base plate 10 is used the circuit substrate of being made by the copper plating film laminated base plate, thereby each antenna element 20 is formed banded copper foil pattern.In addition, from the characteristic aspect, preferablydielectric base plate 10 is used PTFE (polytetrafluoroethylene) substrate.In addition, as variation, can also use metal wire rod to antenna element 20.

When the belt-like zone that formsdirector 20a, 20b, 20c,reflector 20d andreflector 20e indielectric base plate 10 is made as the 11a of element formation portion～11e, these each middle bodies of eachelement formation 11a～11e of portion by linking into an integrated entity with the upwardly extendingmain framing plate 12 in the side of antenna element 20 quadratures, are respectively arranged with peristome (space) each other between eachelement formation 11a～11e of portion.When explanation,, these element formation portions are generically and collectively referred to as element formation portion 11 in addition there is no need to distinguish under the situation of eachelement formation 11a～11e of portion.

That is, betweenelement formation 11a of portion and 11b, clipmain framing plate 12 ground and wear 1 couple ofperistome 13a, 13a in its both sides.Equally, betweenelement formation 11b of portion and 11c, betweenelement formation 11c of portion and the 11d, also wear 1 couple ofperistome 13a and 13a, 13b and 13b, 13c and 13c, 13d and 13d betweenelement formation 11d of portion and the 11e respectively.In addition, when explanation,, these peristomes are generically and collectively referred to as peristome 13 there is no need to distinguish under the situation of eachperistome 13a～13d.

Though it is open anddielectric base plate 10 is made herring-bone form also can making the opposition side of themain framing plate 12 of peristome 13, but making under the situation of herring-bone form, the two ends of each element formation portion 11 become outstanding state, bad to human body etc., mechanical strength has also reduced in addition, therefore in this 1st execution mode, possesses thebridge part 14,14 between the end of Connection Element formation portion 11.

In addition, thisantenna assembly 1A possesses: for example be used to connect theconnector 31 of the not shown feed line of being made by coaxial cable and be used to makeantenna assembly 1A to be supported onsky wire maintainer 41 on the not shown antenna holder etc.

As shown in Figures 2 and 3, in this example, be provided with the installinghole 42 of the welding ofconnector 31 withpad 32 andday wire maintainer 41 in the end of thereflector 20e ofdielectric base plate 10 side,connector 31 is welded on welding with on thepad 32, and aday wire maintainer 41 is tightened on the installing hole 42.A connector 31 and aday wire maintainer 41 can use commercially available.

As shown in Figure 2,director 20a, 20b, 20c andreflector 20e are arranged on the one side side ofdielectric base plate 10, and as shown in Figure 3,reflector 20d is arranged on the another side side ofdielectric base plate 10.

By making such configuration, though betweenreflector 20d andconnector 31, disposedreflector 20e, but the welding that can connectreflector 20d andconnector 31 by printedwiring 33a, the 33b that forms ondielectric base plate 10 has improved the degree of freedom of design withpad 32.

In addition, in this example,reflector 20d is cut apart in central authorities, the reflector pattern of one side is connected with the supply side in the pad 32 (strong emissivity (hot) side) with welding by printedwiring 33a, and the opposing party's reflector pattern is connected with the ground connection side in thepad 32 with welding by printedwiring 33b.

Shown in the profile of Fig. 4, when making design good,, the resin molding of being made by electrical insulating property resin material (preferred environment resistant coating and silicones and with) 51 is set ondielectric base plate 10 in order to improve weatherability when the outdoor application etc.Though resin molding 51 can be arranged on the formation part of copper foil pattern at least, preferably comprise the notch portion of peristome 13, on whole ofdielectric base plate 10, form.

As an example, thisantenna assembly 1A is installed on the antenna holder on stage next door etc., use towards sound source (wireless microphone) side, but owing to be provided with a plurality of peristomes 13, so just almost do not have because the change of the direction that blast causes so long as not high wind.In addition, since in light weight, so carrying is also easy.By the way, frequency acceptance band is under the situation of 800MHz, and the size of thisantenna assembly 1A is the about 216mm of longitudinal size, the about 320mm of lateral dimension.Thickness is decided according to the thickness of employeddielectric base plate 10.

In addition, peristome 13 is set between antenna element 20, owing to there is not the dielectric constant ofdielectric base plate 10 between them, so antenna gain and F/B also are improved than (forward/rear than).The situation that peristome 13 will be set obtains following result as a comparative example during actual measurement.Frequency range: 779～810MHz, bandwidth is 31MHz, and antenna gain is that 9.8dBi compares with example of the present invention, and comparative example is 9.2dBi, and F/B is that 15dBi compares than with example of the present invention, comparative example is 12dBi.

The following describes the 2nd execution mode of Fig. 5 and the 3rd execution mode of Fig. 6.Being intended that of the 2nd execution mode and the 3rd execution mode do not exist the length composition to them to bring the dielectric of bad influence at the place, end of each antenna element 20, makes each antenna element 20 come work according to the length of design basically thus.

This is intended that end by making element formation portion 11 in the position termination roughly the same with the end of antenna element 20, the end face of element formation portion 11 is contacted with the space realize.Other formation can be identical in fact with above-mentioned first execution mode.

For this reason, inantenna assembly 1B according to the 2nd execution mode of Fig. 5,director 20a for the left side, the part at the angle of thebridge part 14 that illustrates in above-mentioned first execution mode is reamed a part, make the length of theelement formation 11a of portion and the same length ofdirector 20a, in addition, fordirector 20b, 20c, each antenna element 20 ofreflector 20d andreflector 20e, make the length of this each element formation portion 11 and the same length of antenna element 20 in the inboard of above-mentionedbridge part 14, make the part of peristome 13 thatspace 13g is provided around going in the end of each element formation portion 11.

In addition, in antenna assembly 1C, eachelement formation 11a～11e of portion is extended to the outside of above-mentionedbridge part 14, in the roughly length range of this eachelement formation 11a～11e of portion, form each antenna element 20 (20a～20e) according to the 3rd execution mode of Fig. 6.

Abovely the present invention has been described, but the present invention is not limited according to illustrated execution mode.For example antenna element is not limited to 5 elements.Because be Yagi antenna, so can possess director, reflector and 3 elements of reflector at least.In addition, eachantenna element 20a～20e also can only be arranged on the one side of dielectric base plate 10.And a day wire maintainer also can be a ceiling suspension type.

Claims (6)

1. antenna assembly, on the dielectric base plate of making by hard material, form the Yagi antenna of each antenna element that contains director, reflector and reflector and make, it is characterized in that, above-mentioned dielectric base plate has above-mentioned each antenna element and forms a plurality of element formation portion that is parallel to each other with the interval of regulation, the middle body of above-mentioned a plurality of element formation portion links into an integrated entity by the main framing plate each other, and is formed with space part between above-mentioned a plurality of element formation portion.

2. the antenna assembly of record in the claim 1 wherein, originally is provided with the sky wire maintainer that feed line connects the connector of usefulness and supports usefulness on one's body at above-mentioned dielectric base plate.

3. the antenna assembly of record in the claim 1 or 2, wherein, above-mentioned dielectric base plate possesses the bridge part between the end that connects said elements formation portion.

4. the antenna assembly of any one record in the claim 1 to 3, wherein, the end of said elements formation portion is in the position termination roughly the same with the end of above-mentioned antenna element, and the end face of said elements formation portion contacts with the space.

5. the antenna assembly of any one record in the claim 2 to 4, wherein, above-mentioned director and above-mentioned reflector arrangement are on the one side of above-mentioned dielectric base plate, and above-mentioned transmitter configuration is on the another side of above-mentioned dielectric base plate, and above-mentioned reflector is connected usefulness with above-mentioned feed line connector connects by the printed wiring that forms on the another side of above-mentioned dielectric base plate.

6. the antenna assembly of any one record in the claim 1 to 5, the element of said elements formation portion forms face and is covered by the electrical insulating property resin material at least.

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