Multiband microline antenna

Patent metadata

Field	Value
Publication number	US-10141633-B2
Application number	US-201615249034-A
Country	US
Kind code	B2
Filing date	Aug 26, 2016
Priority date	Aug 28, 2015
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

A multiband antenna includes a plurality of radiation elements, operative within different frequency bands. The multiband microline antenna includes a base substrate that has a signal feeding trace and a partial ground plane, and two or more additional substrates that have multiple microline radiation elements electromagnetically coupled to the signal feeding trace. Each microline radiation element has a width not greater than 0.1 millimeter, and varies in length and resonant frequency. Various disclosed embodiments include a multiband microline folded monopole antenna, a multiband microline loop antenna, a multiband microline inverted-F antenna and a multiband microline π-shaped antenna.

First claim

The invention claimed is:

1. An antenna apparatus for use in a wireless receiver, comprising:
a first substrate;
a second substrate under the first substrate;
a base substrate under the second substrate;
a first layer on top of the first substrate;
a second layer under the first substrate in a first planar region between the first substrate and the second substrate;
a third layer under the second substrate in a second planar region between the second substrate and the base substrate;
a first plurality of radiation elements positioned on the first layer;
a second plurality of radiation elements positioned on the second layer;
a signal feeding line on the third layer, the signal feeding line being electrical coupled to the first plurality of radiation elements and the second plurality of radiation elements; and
a partial ground plane on an underside of the base substrate.

2. The antenna apparatus of claim 1 , wherein each radiation element from the first plurality of radiation elements has a width not greater than 0.2 millimeter.

3. The antenna apparatus of claim 1 , wherein
at least some of the first plurality of radiation elements have lengths different from each other.

4. The antenna apparatus of claim 1 , wherein
at least some of the first plurality of radiation elements have differing resonant frequencies.

5. The antenna apparatus of claim 1 , wherein
the first plurality of radiation elements have resonant frequencies in a first frequency band, and the second plurality of radiation elements have resonant frequencies in a second frequency band that is different from the first frequency band.

6. The antenna apparatus of claim 1 , wherein the first plurality of radiation elements are electrically coupled to a first common connected feeding arm, and the second plurality of radiation elements are electrically coupled to a second common connected feeding arm.

7. The antenna apparatus of claim 6 , wherein the signal feeding line is electrically coupled with the first common connected feeding arm through a first trans-through micro-via and the second common connected feeding arm through a second trans-through micro-via.

8. The antenna apparatus of claim 7 , wherein the first trans-through micro-via and the second trans-through micro-via each has a diameter of not greater than 0.1 millimeter and is filled with a conductive material.

9. The antenna apparatus of claim 1 , wherein:
the first plurality of radiation elements are electrically connected to a first common coupling arm;
the second plurality of radiation elements are electrically connected to a second common coupling arm; and
the signal feeding line includes a coupling pad at an end to electromagnetically couple the signal feeding line to the first plurality of radiation elements and the second plurality of radiation elements.

10. The antenna apparatus of claim 1 , further including:
a first common grounding arm to electrically connect the first plurality of radiation elements to the partial ground plane through a first trans-through micro-via between the first substrate layer and the base substrate; and
a second common grounding arm to electrically connect the second plurality of radiation elements to the partial ground plane through a second trans-through micro-via between the second substrate and the base substrate.

11. The antenna apparatus of claim 10 , wherein the first trans-through micro-via and the second trans-through via each has a diameter no greater than 0.1 millimeter and is filled with a conductive material.

12. The antenna apparatus of claim 1 , wherein at least one of the first plurality of radiation elements or the second plurality of radiation elements is a folded monopole having a length equal to a quarter of wavelength of an operational frequency; and wherein
radiation elements from the first plurality of radiation elements or the second plurality of radiation elements have passbands with a plurality of different operational frequencies to cover a desired operational frequency bandwidth.

13. The antenna apparatus of claim 1 , wherein at least one of the first plurality of radiation elements or the second plurality of radiation elements is a conductive loop having a length equal to a wavelength of an operational frequency, and wherein
radiation elements from the first plurality of radiation elements or the second plurality of radiation elements have different resonant frequencies that are staggered to cover a desired operational frequency bandwidth.

14. The antenna apparatus of claim 13 , wherein the conductive loop is electrically connected to a common feeding arm at one end and a common grounding arm at another end, and
wherein the common feeding arm is electrically connected to the signal feeding line and the common grounding arm is electrically connected to the partial ground plane by a trans-through micro-via between the first substrate or the second substrate and the base substrate.

15. The antenna apparatus of claim 14 , wherein the trans-through micro-via has a diameter not greater than 0.1 millimeter and is filled with a conductive material.

16. The antenna apparatus of claim 1 , wherein at least one of the first plurality of radiation elements or the second plurality of radiation elements is an inverted-F antenna having a length equal to a quarter of wavelength of an operational frequency, and
radiation elements from at least some of the first plurality of radiation elements or the second plurality of radiation elements have different resonant frequencies that are staggered to cover a desired operational frequency bandwidth.

17. The antenna apparatus of claim 16 , wherein the inverted-F radiation element is electrically connected to a common feeding arm at one end and a common grounding arm at another end, and
wherein the common feeding arm is electrically connected to the signal feeding line and the common grounding arm is electrically connected to the partial ground plane by a trans-through micro-via between the first substrate or the second substrate and the base substrate.

18. The antenna apparatus of claim 17 , wherein the trans-through micro-via has a diameter not greater than 0.1 millimeter and is filled with a conductive material.

19. The antenna apparatus of claim 18 , wherein each of the first plurality of radiation elements and the second plurality of radiation elements is an inverted-F radiation element having a unique operational frequency to provide a multi-band operational frequency coverage by the antenna apparatus.

20. The antenna apparatus of claim 1 , wherein at least one of the first plurality of radiation elements or the second plurality of radiation elements is a π-shaped element having a unique length and resonant frequency, in order to cover a desired operational frequency bandwidth by combination of the resonant frequencies of the first plurality of radiation elements or the second plurality of radiation elements.

21. The antenna apparatus of claim 20 , wherein at least one of the first plurality of radiation elements or the second plurality of radiation elements is connected to a common feeding arm at one end and a common grounding arm at another end, and
wherein the common feeding arm is electrically connected to the signal feeding line and the common grounding arm is electrically connected to the partial ground plane by a trans-through micro-via between the first substrate or the second substrate and the base substrate.

22. The antenna

Assignees

• Zte Corp
• Zte Canada Inc

Inventors

• Cheng Dajun
• Xie Di
• Zhang Hongwei

Classifications

• H01Q9/42

  with folded element, the folded parts being spaced apart a small fraction of the operating wavelength · CPC title

• H01Q1/243 Primary

  with built-in antennas · CPC title