Patent Grant
11769948
The present disclosure relates to dual-band dual polarized antenna for cell phones and other handheld devices.
5G has been evolving at lightening speeds since the Federal Communication Committee (FCC) announced opening up 11 GHz of spectrum above 24 GHz in June, 2016. Many nations, including the US, European Union, China and South Korea, have incorporated trials of early 5G networks and established regional 5G service. Along with the enormous potential, the development of mmWave-based mobile network faces unprecedented challenges. In comparison to the sub-6 GHz frequencies, signal attenuation and path loss become more sever at mmWave frequencies.
Antenna implementation on smartphones is even more demanding since it usually requires full spatial coverage and polarization diversity. Generating vertically-polarized radiation is a major challenge in 5G smartphone antenna design due to the use of ultra-thin substrates (typically less than 1 mm) in consumer electronics. Furthermore, design trends for larger metallic displays and thinner phone cases further limit the available real estate for antennas. Significant efforts have been devoted to the development of high-gain, vertically-polarized mmWave antennas. However, these antennas only operate in a single band and have very limited bandwidth.
This section provides background information related to the present disclosure which is not necessarily prior art.
This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.
In one aspect, a wideband dual-polarized antenna is presented. The antenna is comprised of a folded dipole antenna element and a folded monopole antenna element. The folded dipole antenna element is configured to receive and radiate horizontally polarized waves in a frequency band; whereas, the folded monopole antenna element is configured to receive and radiate vertically polarized waves in the frequency band. The folded dipole antenna element and the folded monopole antenna element are monolithically integrated onto the substrate.
In one embodiment, the folded monopole antenna element is shape of a rectangle with opposing folded corners. The folded monopole antenna element further includes at least one feed pin electrically coupled along an edge of the planar conductor and a plurality of shorting pins electrically coupled between the planar conductor and the ground plane, where the plurality of shorting pins are spatially separated by λ/2 from the at least one feed pin.
In one embodiment, the lower bound of the frequency band is greater than 24 Ghz.
In another aspect, a dual-band dual-polarized antenna is presented. The antenna is comprised of a dipole antenna element, a folded dipole antenna element, a low-band folded monopole antenna, and a high-band folded monopole antenna element. The dipole antenna element is configured to receive and radiate horizontally polarized waves in a first frequency band; whereas, the folded dipole antenna element is configured to receive and radiate horizontally polarized waves in a second frequency band, where lower bound of the second frequency band is higher than upper bound of the first frequency band. Similarly, the low-band folded monopole antenna element is configured to receive and radiate vertically polarized waves in the first frequency band; whereas, the high-band folded monopole antenna element is configured to receive and radiate vertically polarized waves in the second frequency band. The dipole antenna element, the folded dipole antenna element, the low-band folded monopole antenna element and the high-band folded monopole antenna element are monolithically integrated onto the substrate.
In one embodiment, the lower bound of the first frequency band is greater than 24 GHz. For example, the first frequency band is 24-30 GHz and the second frequency band is 37-43 GHz.
Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.
Example embodiments will now be described more fully with reference to the accompanying drawings.
The antenna 10 may include an array of horizontally-polarized antenna elements 12 and an array of vertically polarized antenna elements 14. Each antenna element in the array of horizontally-polarized antenna elements 12 is configured to receive and radiate horizontally polarized waves in a frequency band. Each antenna element in the array of vertically polarized antenna elements 14 is configured to receive and radiate vertically polarized waves in the same frequency band. In this example, the array of horizontally-polarized antenna elements 12 is disposed along the edge of the antenna structure; whereas, the array of vertically polarized antenna elements 14 is disposed between the array of horizontally-polarized antenna elements 12 and a via fence 16. It is understood that each array may include one or more antenna elements.
The via fence 16 is a row of metal pins embedded in the multi-layer structure 20. Each metal pin in the row of metal pins extends between the top layer 21 and the bottom layer 22. The row of metal pins is configured to separate the folded dipole antenna element and the folded monopole antenna element from other circuit components integrated onto the substrate. In the example embodiment, the row of metal pins extends between opposing edges of the multi-layer structure 20, thereby partitioning the substrate into an antenna area and a non-antenna area. It is envisioned that the via fence 16 may be configured in other ways to partition the antenna components from the other circuit components.
In the example embodiment, each antenna element 12 in the array of horizontally polarized antenna elements is further defined as folded dipole antenna element 31 as seen in
For vertical polarization, each antenna element 14 in the array of vertically polarized antenna elements is further defined as a folded monopole antenna element 61 as seen in
The vertically polarized antenna elements 14 are formed in the upper layers of the multi-layer structure 21 but beneath the horizontally polarized antenna elements 12. In the example embodiment, the vertically polarized antenna elements 14 are disposed on sixth layer below the top layer of the multilayer structure. In this way, the horizontally polarized antenna elements 12 and the vertically polarized antenna elements 14 are monolithically integrated onto the substrate.
In one embodiment, the array of horizontally-polarized antenna elements 92 are shown in
The folded dipole antenna element 95 is disposed adjacent to the dipole antenna element 94 and is formed by a planar conductor in the top layer of the multi-layer structure. The folded dipole antenna element 95 is also configured to receive and radiate horizontally polarized waves but in a second frequency band, where the lower bound of the second frequency band is higher than the upper bound of the first frequency band. In this example, folded dipole antenna element is rectangular with a t-shaped slot formed therein although other shapes are contemplated by this disclosure. While particular shapes are shown for the antenna elements, different shapes are contemplated by this disclosure.
Each element of the dual-band antenna array is connected to individual coherent transceivers whose input/output, at an intermediate frequency or baseband, can be phase shifted in such a way to form a beam at any desired direction.
In the example embodiment, the low-band monopole antenna element 182 is the shape of a rectangular patch with folded opposing corners. The low-band monopole antenna element 182 includes at least one feed pin electrically coupled along an edge of the planar conductor and a plurality of shorting pins electrically coupled between the planar conductor and the ground plane. The feed pins are preferably arranged on opposing side of the planar conductor from the shorting pins. More specifically, the shorting pins are spatially separated by λ/2 from the feed pin, where λ corresponds to a wave in the first frequency band. Other shapes for the low-band monopole antenna element are contemplated by this disclosure.
In the example embodiment, the high-band monopole antenna element 184 is comprised of two patches: a bowtie shaped patch and a trapezoid shaped patch. The trapezoid shaped patch is capacitively coupled to the bowtie patch with its narrow end positioned proximate the middle of the bowtie to increase bandwidth of the high-band monopole antenna element. The bowtie shaped patch has a length of approximately λ/2 with a feeding pin at one longitudinal end and a shorting pin at the other longitudinal end. Other shapes for the high-band monopole antenna element are contemplated by this disclosure.
The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms “comprises,” “comprising,” “including,” and “having,” are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being “on,” “engaged to,” “connected to,” or “coupled to” another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly engaged to,” “directly connected to,” or “directly coupled to” another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first,” “second,” and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as “inner,” “outer,” “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the example term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
This application claims the benefit of U.S. Provisional Application No. 63/026,000, filed on May 16, 2020. The entire disclosure of the above application is incorporated herein by reference.
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| Number | Date | Country | |
|---|---|---|---|
| 20210359413 A1 | Nov 2021 | US |
| Number | Date | Country | |
|---|---|---|---|
| 63026000 | May 2020 | US |
