Internal digital TV antennas for hand-held telecommunications device
First Claim
1. A method comprising:
- providing an unbalanced antenna having a radiative element and a feed line in an antenna structure; and
electrically coupling the antenna to a matching circuit having at least one resonance stage to achieve at least two resonances within a frequency range for receiving digital video broadcasting signals, the matching circuit comprising at least one resonator connected to the feed line.
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Accused Products
Abstract
An antenna structure comprises an unbalanced antenna for receiving digital video broadcasting signals. The antenna is dimensioned to fit within an electronic device, such as a mobile phone. The unbalanced antenna has a radiative element and a feed line connected to a matching circuit so as to achieve two or more resonances within a DVB-H frequency range, such as 470 to 702 MHz. The physical length of the radiative element is always smaller than λ/4 at the frequencies of interest (470-702 MHz), but the electrical length can be smaller or substantially equal to λ/4. The matching circuit can comprise one or more LC resonators depending on the number of resonances. The resonators can be series or parallel connected between the feed line and RF circuitry for processing the broadcasting signals. The antenna can be tuned to other bands above the DVB-H frequencies for use as a diversity or MIMO antenna.
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Citations
21 Claims
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1. A method comprising:
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providing an unbalanced antenna having a radiative element and a feed line in an antenna structure; and electrically coupling the antenna to a matching circuit having at least one resonance stage to achieve at least two resonances within a frequency range for receiving digital video broadcasting signals, the matching circuit comprising at least one resonator connected to the feed line. - View Dependent Claims (2, 3)
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4. An antenna structure comprising:
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an unbalanced antenna having a radiative element and a feed line; and a matching circuit having at least one resonance stage electrically coupled to the antenna, the matching circuit comprising at least one resonator connected to the feed line so as to achieve at least two resonances within a frequency range for receiving digital video broadcasting signals. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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13. An electronic device, comprising:
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a housing; a circuit board having a ground plane; an unbalanced antenna disposed on the circuit board inside the housing for receiving digital-video broadcasting signals in a frequency range, the unbalanced antenna having a radiative element and a feed line; and a matching circuit having at least one resonance stage electrically coupled to the antenna, the matching circuit comprising at least one resonator connected to the feed line so as to achieve at least two resonances within said frequency range. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification