CN2130290Y - Wide-fequency aerial with ball-shaped top - Google Patents

Abstract

The utility model relates to a wide-frequency aerial with ball-shaped top, mainly composed of an aerial an insulating sheath, a matching element, a fixed ring, a central pin seat, a seat for a high-frequency joint ring, etc., wherein, the matching element (or an electrical inductance loop) is plugged in the ball-shaped aerial head and the ring seat, so that the spring-shaped matching element creates a potential capacitor with the seat for the high-frequency joint ring and forms a matching network. The utility model has the major functions that the installation is convenient without a device for testing and adjusting; the volume is small, namely only 3 centimeters height, but the information receiving effect of the utility model is better than the information receiving effect of a common type aerial.

Description

Wide-fequency aerial with ball-shaped top

The utility model relates to a kind of Communication Equipment antenna assembly.

General Communication Equipment all need utilize antenna to finish the task of transmitting-receiving signal, owing to Communication Equipment transmitting-receiving port all designs 50 traditional ohmages (using for cooperating the pertinent instruments design), compare with the impedance (more than 377 ohm) in the free space, then be difficult to reach the state of coupling fully because of resistance value is too wide in the gap, must use antenna to do media this moment, reach the purpose of impedance matching on the one hand, increase the intensity of signal on the other hand, as fail to make the antenna of making good use of then can make equipment transmitting-receiving signal because of mating the bad reflection loss that produces a large amount of signals.Therefore, the quality of Antenna Design, quite important, good antenna can be given full play to the characteristic of equipment, and it is far that signal is communicated to, otherwise then can't bring into play the function of equipment, even reduce the equipment life-span; In addition, antenna uses and influenced by landform, atural object.So, need to adjust that to align transmit direction can reception good, but this very is inconvenience, the especially general stock formula antenna that uses, because of oversize not easy-to-collection, thus be designed to more scalable or folding, but its complex structure comparatively speaking, cost is also higher.

The purpose of this utility model is to avoid above-mentioned deficiency of the prior art and a kind of wideband ball heads antenna is provided, so that equipment is received and dispatched signal better.

For achieving the above object, the utility model mainly is made up of spherical antenna, insulating sleeve, spring-like matching element and retainer ring thereof, center needle stand and high-frequency joint cover ring seat etc.; Ring-type line on the previous day is made by metal material, and front end is a socket pipe, is bonded in the plastic insulation sheath for being inserted in, and it is interior and bore a deep hole, but a matching element conducting of voltage supply plug retainer ring, and the insulating sleeve front end is an external screw thread, is tightened in the cover ring seat; In the hollow tube of sheath and cover ring seat formation, one group of matching element group then is housed, wherein spring-like matching element (inductance coil) end is solidly plugged in the fixing hole of center needle stand, and center needle stand front end is inserted in an insulating part hole again, and this insulating part plug sleeve is in cover ring seat front end endoporus; The cover ring seat is that metal is made, and front end is the high-frequency joint of an external screw thread shape.

The drawing of the accompanying drawing that the utility model adopts is described as follows:

Fig. 1 is a three-dimensional assembled view of the present utility model

Fig. 2 is a plane of the present utility model assembled view

Fig. 3 is an isometric exploded view of the present utility model

Fig. 4 is the coaxial transmission line profile

Fig. 5 is equivalent electric characteristic impedance figure

Fig. 6 is impedance matching figure

Fig. 7 is a two-period form matching network schematic diagram

Fig. 8 is an equivalent circuit diagram

Below in conjunction with drawings and Examples the utility model is further described.

As Fig. 1 and Fig. 2, the utility model embodiment mainly comprises spherical antenna 1, insulating sleeve 2, retainer ring 3, spring-like matching element 4, center needle stand 5 and high-frequency joint cover ring seat 6 etc.; Wherein ball heads antenna 1 is made for metal material, front end be a socket pipe 7(as shown in Figure 3), this socket pipe 7 is inserted in and is bonded in the plastic insulation sheath 2, in the ball heads antenna 1 and bore a deep hole 8, a but matching element conducting of tamponade retainer ring 3 in it, insulating sleeve 2 front ends are an external screw thread 9, strike up partnership with it for being tightened in the cover ring seat 10; And in the hollow tube of sheath 2 and ring seat 10 formations, one group of matching element group then is housed, spring-like matching element 4(inductance coil) a end is solidly plugged in the fixing hole 11 of center needle stand 5, and needle stand 5 front ends in center are inserted in the hole 13 of an insulating part 12 again, and this insulating part 12 is that plug sleeve is in the hole 14 of cover ring seat 6 front ends; Cover ring seat 6 is that metal is made, and front end is the high-frequency joint 15 of an external screw thread shape.

Again design principle and the wideband characteristic of the utility model embodiment is outlined in down below: generally be transmitted in the high-frequency characteristic, the profile of coaxial transmission line as shown in Figure 4, wherein A is a ground wire, B is a transmission medium, C is a central axis; Fig. 5 is the equivalent characteristic impedance diagram, and by this transmission line structure (diameter and use material) decision, different frequencies has different complex impedance (R+jx) to characteristic impedance value fully; Fig. 6 expresses the basic mode of impedance matching, if the characteristic impedance value of match circuit is Z0, Z0=Z1 * Z2 then, wherein, Z1, Z2 respectively are the impedance of port one and port 2, suppose that port one is the output port of equipment, and then Z2 is the characteristic impedance of free space, as shown in Figure 6, can reach the most basic impedance matching; When cooperating some more complicated special wideband demands, above-mentioned basic impedance matching then can not realistic required (greater than 12% frequency range), then two-period form or more the matching network of multisection type arise at the historic moment, as Fig. 7 and Fig. 8.The size of every part has apparent difference because of the difference of each characteristic frequency influences each matching network, but its basic structure is as figure.Owing to have various complex impedance between coil and dome and between coil and pedestal, therefore potential electric capacity is stored in therebetween and constitutes match circuit.

Comprehensively above-mentioned, the utility model designs with an innovation concept and complete principle, not only make antenna height reduction a lot of (only about 3 centimeters), and its spherical shape antenna can receive the signal of nearly 360 degree directions, exempt and need different and shortcoming that will adjust according to the landform orientation, this external manufacturing fit on is also more simple, must not need through the manufacture process of complexity and loaded down with trivial details test adjustment like that to general antenna.

Claims (1)

1, a kind of wideband ball heads antenna, mainly comprise ball heads antenna, insulating sleeve, spring-like matching element and retainer ring thereof, center needle stand and high-frequency joint cover ring seat, it is characterized in that the ball heads antenna is that metal material is made, front end is a socket pipe, be inserted in and be bonded in the plastic insulation sheath, it is interior and bore a deep hole, but a matching element conducting of voltage supply plug retainer ring, the insulating sleeve front end is an external screw thread, is tightened in the cover ring seat; In the hollow tube of sheath and cover ring seat formation, one group of matching element group then is housed, wherein spring-like matching element (inductance coil) end is solidly plugged in the fixing hole of center needle stand; And center needle stand front end is inserted in an insulating part hole again, and this insulating part plug sleeve is in cover ring seat front end endoporus, and the cover ring seat is that metal is made, and front end is an external screw thread shape high-frequency joint.

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