Antenna card for controlling and tuning antenna isolation to support carrier aggregation

An antenna, coupled current technology, applied in the third generation partnership project long-term evolution network, wireless or cellular communication antenna field, can solve the problem of mutual coupling increase

Inactive Publication Date: 2016-10-12
INTEL IP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These antennas use the entire printed circuit board (PCB) for radiation and the mutual coupling inc

Method used

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  • Antenna card for controlling and tuning antenna isolation to support carrier aggregation
  • Antenna card for controlling and tuning antenna isolation to support carrier aggregation
  • Antenna card for controlling and tuning antenna isolation to support carrier aggregation

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[0018] For the antenna front end of smart phones and similar mobile devices, antenna isolation is very important. Therefore, the development of a reliable, universal and practical isolation mechanism is the key to success. Practical problems will be encountered when implementing decoupling methods into products. Many methods rely on clearly defined near-field distribution and symmetry to achieve decoupling. Perturbation in the near field will seriously hamper performance. From the perspective of smart device front-end antennas, the most difficult requirement is in-band continuous carrier aggregation (CA), because the system relies on narrow-band tuned antennas to achieve isolation. In this context, a narrowband antenna refers to an antenna that covers a portion of the frequency band smaller than the RX antenna or the TX antenna at any given moment.

[0019] For the low frequency band (699-960MHz) used in LTE, the antenna basically uses the entire printed circuit board (PCB) fo...

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PUM

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Abstract

The invention relates to an antenna card for controlling and tuning antenna isolation to support carrier aggregation. An apparatus and method to provide isolation between a first antenna and a second antenna, each of which is located on a ground plane. A slot that is tunable by a variable reactance is located on the ground plane, the slot not being appreciably resonant at the operating frequency of the first antenna and the second antenna. The antennas operate in an orthogonal mode. Varying the slot reactance varies the electrical distance over which the coupling current between the two antennas flows. Increased RF isolation to a desired magnitude results by maintaining the orthogonality at desired bands. The RF isolation can be measured and a departure from the desired magnitude of isolation causes the reactance to be varied to increase the RF isolation back to the desired magnitude. The antennas and the slot are placed at locations on the ground plane of high current density.

Description

technical field [0001] Some embodiments relate to antennas for wireless or cellular communications. Some embodiments relate to Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) networks. Background technique [0002] Mutual coupling between multiple antennas disposed on the same platform of a mobile device is a limiting factor for multiple-input multiple-output (MIMO) antenna designs, which require a modest level of isolation. These antennas use the entire printed circuit board (PCB) for radiation and the mutual coupling increases significantly when considered for use in the low frequency bands in Long Term Evolution (LTE). In specific applications, even higher levels of isolation than currently used are required. As an example, at least one architecture requires 25dB isolation as antenna isolation required for all operating frequency bands (even low frequency bands). There is a need for an antenna isolation structure capable of controlling antenna iso...

Claims

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Application Information

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IPC IPC(8): H01Q1/52H01Q1/22
CPCH01Q1/22H01Q1/521H01Q1/525H01Q1/243H01Q1/38H01Q21/28H04B1/40H04B7/0404
Inventor 保罗·奥勒森亚历山德鲁·丹尼尔·泰托莫里斯科格特·佩德森埃米尔·布斯克戈德萨曼莎·卡普拉·德尔·巴里奥佩范德·巴赫拉姆兹皮特·邦德格拉德西蒙·斯文森欧勒·雅盖尔斯基博扬·亚纳基夫
Owner INTEL IP CORP
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