Summary of the invention
(1) goal of the invention: for solving above-mentioned problems of the prior art, the purpose of this utility model is to provide the antenna structure that a kind of length is shorter, more compact structure, signal are more stable.
(2) technical scheme: a kind of circumscribed list whip antenna, including SMA radio frequency connector, the first spring, sleeve, radio frequency line, the second spring and shell, wherein, the inner via hole of described SMA radio frequency connector and sleeve connection, sleeve and the first spring connect, the contact pin of described SMA radio frequency connector is connected with radio frequency line, and described radio frequency line and the second spring connect, and described radio frequency line passes the first spring and sleeve.
Preferably, described second spring is provided with an elongated end, and described elongated end is connected with radio frequency line.
Preferably, described radio frequency line includes radio shielding line and is positioned at the shielding line inner core of radio shielding line, and described shielding line inner core extends in radio shielding line.
Preferably, described SMA radio frequency connector includes that upper shell, rotating part and lower house, described upper shell and lower house can 90 ° of bending rotary motions by rotating part.
Preferably, the upper end of described SMA radio frequency connector is provided with case interface, and described case interface is provided with inner via hole, and described case interface is connected with sleeve socket.
Preferably, described sleeve is metal sleeve.
Preferably, described sleeve and the first spring are welded to connect.
Preferably, described radio frequency line and the second spring are welded to connect.
Preferably, described first spring and the second spring are metal spring.
Preferably, the outer wall of described SMA radio frequency connector is fixing with described shell is connected.
(3) beneficial effect: a kind of circumscribed list whip antenna that this utility model provides has the advantage that the antenna structure using dual spiral antenna to coordinate, this antenna structure is compacter, volume is less, conveniently install in small space and use, installation in small space can be further facilitated by the SMA radio frequency connector structure of 90 ° of bendings to operate, this antenna structure have simultaneously antenna frequencies the best, advantage little by ectocine, adaptable.
Detailed description of the invention
Below in conjunction with preferred embodiment, this utility model is described in further details; elaborate more details in the following description so that fully understanding this utility model; but; this utility model obviously can be implemented in multiple these other modes described that are different from; those skilled in the art can make similar popularization according to practical situations, deduce in the case of this utility model intension, the most should be with the content constraints of this specific embodiment protection domain of the present utility model.
Fig. 1-4 is the schematic diagram of embodiment of the present utility model, it should be noted that this accompanying drawing is only used as example, is not to draw according to the condition of equal proportion, and should not be construed as limiting in this, as to actual requirement protection domain of the present utility model.
Antenna is the signal transmission apparatus that wireless sourceless sensor is indispensable, in order to adapt to the convenience used in small space or under different installation environment, need to reduce further the volume of antenna sensor, mainly need to reduce the second spring 30 and the length of elongated end 31 thereof, but reduce antenna length and aerial signal stability can be caused to decline.In order to solve this problem, the inner via hole of the SMA radio frequency connector 10 of the technical program is connected with the first spring 21 by sleeve 20, first spring 21 can being compressed in longer antenna length in less volume size, signal stabilization can be ensured simultaneously and meet the requirement reducing antenna length, the signal adaptive of the first spring 21 is strong, good stability, it is effectively improved defect of the prior art, in order to reduce the volume of antenna sensor further, need the length of further radio frequency line 19, therefore connect in the end of radio frequency line 19 and have the second spring 30, the antenna structure that radio frequency line 19 and the second spring 30 connect can effectively reduce the entire length of antenna.
A kind of circumscribed list whip antenna, including SMA radio frequency connector 10, first spring 21, sleeve 20, radio frequency line 19, second spring 30 and shell 40, wherein, the inner via hole of described SMA radio frequency connector 10 is connected with sleeve 20, sleeve 20 is connected with the first spring 21, the contact pin of described SMA radio frequency connector 10 is connected with radio frequency line 19, described radio frequency line 19 is connected with the second spring 30, described radio frequency line 19 is through the first spring 21 and sleeve 20, dual spring antenna has compact conformation, the advantage of signal stabilization, the antenna structure length being particularly connected with contact pin and inner via hole is shorter, effectively reduce the volume of antenna, it it is preferably helical antenna structure.
Described second spring 30 is provided with an elongated end 31, and described elongated end 31 is connected with radio frequency line 19, and elongated end 31 can be convenient to the attended operation of the second spring 30 and radio frequency line 19.
Described radio frequency line 19 includes radio shielding line 11 and is positioned at the shielding line inner core 12 of radio shielding line 11, described shielding line inner core 12 extends in radio shielding line 11, described elongated end 31 is connected with shielding line inner core 12, and shielding line inner core 12 reserves certain length also for the attended operation facilitating the second spring 30 and radio frequency line 19.
Described SMA radio frequency connector 10 includes upper shell 15, rotating part 18 and lower house 16, described upper shell 15 and lower house 16 can 90 ° of bending rotary motions by rotating part 18, SMA radio frequency connector 10 is arranged to the structure that three critical pieces connect, upper shell 15 and first spring 21 on top, sleeve 20 connects, the contact pin of SMA radio frequency connector 10 is connected with the second spring 30 by radio frequency line 19, contact pin is fixed on the lower house 16 of SMA radio frequency connector 10, radio frequency line 19 extends out through rotating part 18 and upper shell 15, lower house 16 is connected with wireless sourceless sensor;Installing for convenience and connect, lower house 16 is connected by rotating part 18 with upper shell 15, greatly facilitates antenna installation operation in the environment of small space and different installation site.
Described lower house 16 end is provided with the convenient stubborn set 17 installing operation, this twists to be additionally provided with on set 17 increases the band of frictional force, when antenna and wireless sourceless sensor attended operation, rotated by stubborn set 17 and install, need not antenna integral-rotation realize installing, the installation simplification greatly facilitating antenna sensor and the installation being particularly well-suited in small space operation.
The upper end of described SMA radio frequency connector 10 is provided with case interface 13, described case interface 13 is provided with inner via hole 14, described case interface 13 is connected with sleeve 20 socket, and described sleeve 20 can be socketed in the outside of case interface 13, or sleeve 20 can be socketed in the inner side of case interface 13.It is higher that sleeve 20 and case interface 13 fix connectivity robustness.
Described sleeve 20 is the metal that electric conductivity is good, preferably copper sleeve, and copper sleeve is connected with copper inner via hole, and signal is more stable, connects effect more preferable, and service life is longer.
Described sleeve 20 is welded to connect with the first spring 21, and the first spring 21 is welded to connect with sleeve 20, low cost of manufacture, and connective stability is good, and service life is long, easy to maintenance.
Described radio frequency line 19 is welded to connect with the second spring 30, and radio frequency line 19 is welded to connect with the second spring 30, low cost of manufacture, and connective stability is good, and service life is long.
Described first spring 21 and the second spring 30 are metal spring, and the intensity of metal spring is high, signal stabilization is good, low cost of manufacture, is susceptible to the impact of outer signals.
The outer wall of described SMA radio frequency connector 10 is fixing with described shell 40 to be connected, further, shell 40 is connected with the case interface 13 of SMA radio frequency connector 10, shell 40 is fixed with SMA radio frequency connector 10 after being connected and is installed and used, i.e. ensure that the convenience that antenna is installed, antenna structure can be prevented again damaged by ectocine, and impact is normal to be used and service life.
Above content is the explanation of the preferred embodiment to the invention, and those skilled in the art can be helped to be more fully understood by the technical scheme of the invention.But, these embodiments are merely illustrative, it is impossible to assert that the detailed description of the invention of the invention is only limitted to the explanation of these embodiments.For the invention person of an ordinary skill in the technical field, without departing from the concept of the premise of the invention, it is also possible to make some simple deductions and conversion, all should be considered as belonging to the protection domain of the invention.