Switchable diversity antenna apparatus and methods
First Claim
1. Diversity antenna apparatus, comprising:
- a first diversity antenna apparatus configured to operate in a first frequency range and comprising a first feed portion configured to be coupled to a diversity feed structure of a radio device; and
a second diversity antenna apparatus configured to operate in a second frequency range, and comprising;
a first radiator comprising a second feed portion configured to couple a radiating portion to the diversity feed structure;
a second radiator comprising a first portion and a second portion, the second portion configured to be coupled to a ground plane of the radio device; and
a selector apparatus configured to selectively couple the first portion of the second radiator to the ground plane;
wherein the selector apparatus is configured to enable wireless communication of the radio device in at least two operational bands within the second frequency range; and
wherein the first feed portion configured to be coupled to the diversity feed structure forms at least a portion of a coupled-feed configuration, the coupled feed configuration enabling the diversity antenna apparatus to be substantially insensitive to dielectric loading during device operation.
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Accused Products
Abstract
An active diversity antenna apparatus and methods of tuning and utilizing the same. In one embodiment, the active diversity antenna is used within a handheld mobile device (e.g., cellular telephone or smartphone), and enables device operation in several low frequency bands (LBs). The exemplary implementation of the active LB diversity antenna comprises a directly fed radiator portion and a grounded (coupled fed) radiator portion. The directly fed portion is fed via a feed element connected to an antenna feed. The coupled fed portion of the LB antenna is grounded, forming a resonating part of the low frequency band. A gap between the two antenna portions is used to adjust antenna Q-value. Resonant frequency tuning is achieved by changing the length of the grounded element. The LB feed element is disposed proximate the feed element of a high band diversity antenna, thus reducing transmission losses and improving diplexer operation.
475 Citations
21 Claims
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1. Diversity antenna apparatus, comprising:
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a first diversity antenna apparatus configured to operate in a first frequency range and comprising a first feed portion configured to be coupled to a diversity feed structure of a radio device; and a second diversity antenna apparatus configured to operate in a second frequency range, and comprising; a first radiator comprising a second feed portion configured to couple a radiating portion to the diversity feed structure; a second radiator comprising a first portion and a second portion, the second portion configured to be coupled to a ground plane of the radio device; and a selector apparatus configured to selectively couple the first portion of the second radiator to the ground plane; wherein the selector apparatus is configured to enable wireless communication of the radio device in at least two operational bands within the second frequency range; and wherein the first feed portion configured to be coupled to the diversity feed structure forms at least a portion of a coupled-feed configuration, the coupled feed configuration enabling the diversity antenna apparatus to be substantially insensitive to dielectric loading during device operation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A mobile communications device, comprising:
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an enclosure comprising a plurality of sides; an electronics assembly comprising a ground plane and at least one feed structure; a main antenna assembly configured to operate in a lower frequency range and an upper frequency range and disposed proximate a bottom side of the plurality of sides; and a diversity antenna assembly disposed along a lateral side of the plurality of sides, the lateral side being substantially perpendicular to the bottom side; wherein the diversity antenna assembly comprises; a first diversity antenna apparatus configured to operate in the upper frequency range and comprising a first feed portion coupled to the feed structure; and a second diversity antenna apparatus configured to operate in the lower frequency range, and comprising; a first radiator comprising a second feed portion configured to couple a radiating portion to the feed structure; a second radiator, comprising a ground structure coupled to the ground plane; and a selector element configured to selectively couple a selector structure of the second radiator to the ground plane; and wherein the selector element is configured to enable wireless communication of the mobile communication device in at least four operational bands within the lower frequency range. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. Active low band diversity antenna apparatus, comprising:
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at least first and second radiating elements; and a coupled feed configuration comprising a common feed structure coupled to both;
(i) a feed portion of one of the at least first and second radiating elements of the low band diversity antenna apparatus; and
(ii) a feed portion of a high band diversity antenna apparatus;wherein the coupled feed configuration enables the diversity antenna apparatus to be substantially insensitive to dielectric loading during device operation; wherein the active low band diversity antenna apparatus is configured to operate over several spaced bands of a lower frequency range required by a wireless communication network standard; and wherein the standard comprises a Long Term Evolution (LTE) standard, and the several spaced bands are selected from the B17, B20, B5, B8, and B13 bands thereof. - View Dependent Claims (21)
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Specification