Patent Application
20130335294
1. Technical Field
The present disclosure relates to an antenna device for electromagnetic measurement.
2. Description of Related Art
In electromagnetic measurement, such as electromagnetic interference measurement, a test antenna is rotatably installed to a supporting pole for measuring an information technology equipments (ITEs), such as personal computers, liquid crystal displays, or mobile phones. The test antenna needs to align with the ITE during the test antenna sliding along the supporting pole, and the horizontal distance between the directional test antenna and the ITE is changed. However, the test antenna needs to be moved relative to the ITE, to allow the horizontal distance meets the measurement specification, which is time-consuming and inconvenient.
Many aspects of the present embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, all the views are schematic, and like reference numerals designate corresponding parts throughout the several views.
The present disclosure, including the accompanying drawings, is illustrated by way of examples and not by way of limitation. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one.
The base 10 includes a rectangular shell 12, a cover 14, and a holder 16, mounted on the underside of the shell 12. The holder 16 is substantially cross-shaped and includes four conveying pulleys 162 respectively mounted on the undersides of the holder 16. Thus the holder 16 and the base 10 can be horizontally moved due to rotation of the conveying pulleys 162. The shell 12 defines a receiving space 122. The cover 14 is covered on the shell 12 for shielding the receiving space 122.
The first slide apparatus 26 includes four connecting plates 262 connected end to end to form a rectangular frame slidably fitted about the pole 21. Each of a top and a bottom of each connecting plate 262 is installed with a shaft 263. Two rollers 266 are rotatably fitted about each shaft 263 and are rotated along the pole 21. A positioning block 265 protrudes out from one of the connecting plate 262, and a part of the transmission belt 22 is fixedly extended through another connecting plate 262 neighboring the positioning block 265. In this way, movements of the transmission belt 22 along the pole 21 can drive the first slide apparatus 26 to slide along the pole 21. The positioning block 265 defines a shaft hole 2652 along the horizontal direction.
The second adjusting apparatus 30 includes a pole 31 parallel to the pole 21, a transmission belt 32, a second motor 34 driving the transmission belt 32, and a second slide apparatus 36. The second slide apparatus 36 is slidably fitted about the pole 31. The second slide apparatus 36 includes a positioning block 365 defining a shaft hole 2652 along the horizontal direction.
The supporting apparatus 40 includes a supporting pole 41 with the antenna 50 mounted to a first end of the supporting pole 41, a first connecting block 411 installed to a second end of the supporting pole 41 opposite to the antenna 50, and a second connecting block 42 fitted about the supporting pole 41, between the first connecting block 411 and the rotation apparatus 80. A cylinder 412 with a telescopic rod 414 is installed in the first connecting block 411, and an end of the telescopic rod 414 away from the cylinder 412 is mounted to the second end of the supporting pole 41. A shaft 416 protrudes out from the first connecting block 411, to be rotatably received in the shaft hole 2652 of the first slide apparatus 26. The second connecting block 42 defines a through hole 424 for slidably receiving the supporting pole 41. A shaft 422 protrudes out from the second connecting block 42, to be rotatably received in the shaft hole 3652 of the second slide apparatus 36.
The rotation apparatus 80 includes a substantially L-shaped installation bracket 81 installed to the first end of the supporting pole 41, a cylinder 82, a rack 84 slidable through the cylinder 82, and a rotation pole 86. The installation bracket 81 includes a rectangular first plate 812 fixed to the supporting pole 41, and a second plate 814 perpendicularly extending from a side of the first plate 812 toward the antenna 50. The second plate 814 defines a slot 816 parallel to the first plate 812, for receiving the rack 84 and the cylinder 82. A gear pulley 87 is installed to the rotation pole 86, to mesh with the rack 84. A first end of the rotation pole 86 axially defines a shaft hole (not shown) for rotatably receiving the first end of the supporting pole 41. The antenna 50 is installed to a second end of the rotation pole 86 opposite to the rotation apparatus 80. The gear pulley 87 is firmly fitted about a middle of the rotation pole 86.
Even though numerous characteristics and advantages of the embodiments have been set forth in the foregoing description, together with details of the structure and function of the embodiments, the present disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the embodiments to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2012101959204 | Jun 2012 | CN | national |
Relevant subject matter is disclosed in two pending U.S. patent applications, both titled “ANTENNA DEVICE FOR ELECTROMAGNETIC MEASUREMENT”, respectively with the application Ser. No. 13/491,582, filed on Jun. 7, 2012, and 13/525,387, filed on Jun. 18, 2012, which are assigned to the same assignee as this patent application.
