Dual antenna and radio device
First Claim
1. An arrangement for enhancing electrical isolation between antennas which comprise a first antenna and a second antenna belonging to one and the same radio device, wherein at least the first antenna comprises structural parts to degrade its matching at frequencies of an operating band of the second antenna.
5 Assignments
0 Petitions
Accused Products
Abstract
An arrangement for enhancing electrical isolation between antennas in antenna structures comprising at least two antennas, and a radio device applying the arrangement. The interfering antenna comprises components causing substantial degradation in radiation characteristics in the operating band of another antenna. For example, a PIFA (310) may comprise, instead of a short-circuit conductor, a conductive structure (312, 313, 314) having a parallel resonance in the operating band of another antenna (320). Mutual interference of radio parts using separate antennas can be made relatively small without electrical isolation arrangements between antenna elements. Moreover, the invention makes antenna filter design easier and reduces disadvantages caused by antenna filters.
53 Citations
13 Claims
- 1. An arrangement for enhancing electrical isolation between antennas which comprise a first antenna and a second antenna belonging to one and the same radio device, wherein at least the first antenna comprises structural parts to degrade its matching at frequencies of an operating band of the second antenna.
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13. A radio device with a first antenna and a second antenna, wherein at least the first antenna includes structural parts to degrade its matching at the frequencies of an operating band of the second antenna and thus to enhance electrical isolation between said antennas.
Specification