Compact PIFA antenna for automated manufacturing
View Patent ↗An RF Parallel Inverted “F” Antenna (PIFA) antenna ( 101 ) that is suitable for incorporation into wireless devices constructed with automated manufacturing techniques. The PIFA antenna ( 101 ) includes a first arm ( 102 ) and a parallel second arm ( 104 ) connected by a conductive bridge ( 106 ). An RF feed ( 108 ) is attached to one end of the first arm ( 102 ) and is used to physically and electrically mount the compact PIFA antenna ( 101 ). An opposite end of the compact PIFA antenna ( 101 ) includes a support structure ( 150 ) that provides stability and support of the compact PIFA antenna ( 101 ) during construction of a circuit board on which it is mounted. The end support ( 150 ) is designed to minimize the use of insulating material to minimize dielectric effects upon the radiation pattern of the conductive elements of the compact PIFA antenna ( 101 ) all while maximizing the mechanical stability of the component during secondary manufacturing operations.
1. An antenna, comprising:
a first arm with a first end and an opposite end;
a second arm, substantially parallel to, co-planar with, and separated from the first arm along a length of the first arm and the second arm, and with a first end that is substantially aligned with the first end of the first arm;
a conducting bridge, electrically connected to the first end of the first arm and the first end of the second arm;
a feed element, electrically connected to the opposite end of the first arm, for connection to an RF feed; and
a non-conductive support depending from the conducting bridge.
2. The antenna of claim 1 , wherein the conducting bridge comprises a conductive sheet forming a plane that is substantially perpendicular to the plane formed by the first arm and the second arm.
3. The antenna of claim 1 , wherein the feed element comprises a conductive sheet forming a plane that is substantially perpendicular to the plane formed by the first arm, and wherein the feed element comprises a ground contact and an RF contact, wherein the ground contact and the RF contact each comprise a conductive sheet separated by a gap.
4. The antenna of claim 1 , wherein the opposite end of the first arm has a tapered cut.
5. The antenna of claim 1 , wherein the second arm is longer than the first arm.
6. The antenna of claim 1 , wherein the second arm is shorter than the first arm.
7. The antenna of claim 1 , wherein the second arm comprises at least one bend.
8. The antenna of claim 1 , wherein the antenna is packaged into a tape and reel packaging.
9. The antenna of claim 1 , wherein the feed element extends perpendicularly for a distance from first arm and wherein the non-conductive support extends to the distance.
10. The antenna of claim 1 , wherein at least one of the conducting bridge, the first arm, the second arm, and the feed element comprises a feature to facilitate adhesion with the non-conductive support.
11. The antenna of claim 1 , wherein the non-conductive support further extends into a gap between the first arm and the second arm.
12. The antenna of claim 1 , wherein the non-conductive support comprises a plurality of legs.
13. The antenna of claim 12 , wherein at least some of the legs within the plurality of legs taper to a minimum size.
14. The antenna of claim 1 , further comprising a non-conductive surface bridging at least part of a gap between the first arm and the second arm.
15. The antenna of claim 14 , wherein the non-conductive surface is fabricated with a free flowing injection molding process that allows insulation material to flow into and solidify into position between the first arm and the second arm.
16. The antenna of claim 14 , further comprising a flat area for vacuum pickup, wherein the flat area comprises at least one of the non-conductive surface, the first arm and the second arm.
17. The antenna of claim 1 , further comprising an end section, wherein the end section is attached to the end of the second arm that is opposite the first and.
18. The antenna of claim 17 , wherein the end section comprise a portion that forms a plane that is perpendicular to the plane of the second arm.
19. The antenna of claim 17 , wherein the and section comprises a portion that is parallel to and offset from the second arm.
20. The antenna of claim 17 , wherein the end section comprises a portion that is coplanar with the second arm and extends into a gap between the first arm and the second arm.
21. The antenna of claim 17 , wherein the end section comprises a portion with an arbitrary geometric shape.
22. The antenna of claim 1 , wherein the antenna is tuned to operate within a plurality of RF bonds.
23. The antenna of claim 22 , wherein the plurality of RF bands comprises a first RF band comprising 2.4 GHz and a second RF band comprising 5.0 GHz.
24. The antenna of claim 23 , wherein the first RF band has a bandwidth of about 100 MHz.
25. The antenna of claim 23 , wherein the second RF band has a bandwidth of about 1.0 GHz.
26. A wireless device, comprising:
a circuit board for mounting at least one compact PIFA antenna, wherein at least one of the at least one compact PIFA antenna comprises:
a first arm with a first end and an opposite end;
a second arm, substantially parallel to, co-planar with, and separated from the first arm along a length of the first arm and the second arm, and with a first end that is substantially aligned with the first end of the first arm;
a conducting bridge, electrically connected to the first end of the first arm and the first end of the second arm;
a feed element, electrically connected to the opposite end of the first arm, for connection to an RF feed; a
a non-conductive support depending from the conducting bridge.
27. An antenna, comprising:
a first arm with a first end and an opposite end;
a second arm, substantially parallel to, co-planar with, and separated from the first arm along a length of the first arm and the second arm, and with a first end that is substantially aligned with the first end of the first arm;
a conducting bridge, electrically connected to the first end of the first arm and the first end of the second arm; and
a feed element, electrically connected to the opposite end of the first arm, for connection to an RF feed, wherein the food element comprises a conductive sheet forming a plane that is substantially perpendicular to the plane formed by the first arm, and wherein the feed element comprises a ground contact and an RF contact, wherein the ground contact and the RF contact each comprise a conductive sheet separated by a gap.