Antenna system comprising driver circuits for transponder
First Claim
1. A transponder for receiving high frequency energy which is wirelessly transferred and for wirelessly transmitting information, comprising:
- an antenna for receiving and transmitting;
an energy storage unit connected to the antenna for storing high frequency energy which is transferred wirelessly to the transponder and is received on the antenna; and
a control and transmission unit for transferring an information signal to the antenna to be transmitted from the antenna using energy stored in the energy storage unit,wherein the antenna comprises at least two separate antenna portions, each one of which is arranged for wireless receiving and wireless transmitting, has a direction in which the efficiency for receiving is at a maximum and works independently of the other antenna portions, the directions being arranged in angular relation to each other.
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0 Petitions
Accused Products
Abstract
A transponder for, for example, domestic animals can receive high frequency energy and transmit information of an antenna (Lx, Ly, Lz) and has a storage capacitor (C5) for storing received energy, which is used for transmitting on the antenna. In order to make the antenna less sensitive to the geometric direction of the received high frequency energy, it has a plurality of antenna coils (Lx, Ly, Lz), that are arranged in an angle to each other, e.g. perpendicularly to each other. Monitoring circuits (LDx, LDy, LDz, 1) can detect the energy received on each coil and compare the detected values to each other and can, for issuing information, use that coil on which the largest energy has been received. Thereby, the transmission can be made in a direction which is considerably more optimal than a direction which otherwise would be obtained in a more random fashion. Each antenna portion is further included in an oscillatory circuit having two different natural frequencies. Thereby information of the transponder can be issued by modulating between these frequencies, what produces a transmission that is more free from interference compared to the case where only one frequency is used with on/off-modulation.
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Citations
22 Claims
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1. A transponder for receiving high frequency energy which is wirelessly transferred and for wirelessly transmitting information, comprising:
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an antenna for receiving and transmitting; an energy storage unit connected to the antenna for storing high frequency energy which is transferred wirelessly to the transponder and is received on the antenna; and a control and transmission unit for transferring an information signal to the antenna to be transmitted from the antenna using energy stored in the energy storage unit, wherein the antenna comprises at least two separate antenna portions, each one of which is arranged for wireless receiving and wireless transmitting, has a direction in which the efficiency for receiving is at a maximum and works independently of the other antenna portions, the directions being arranged in angular relation to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A transponder for receiving high frequency energy which is wirelessly transferred to the transponder for wirelessly transmitting information, the transponder comprising:
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an antenna for receiving and transmitting; an energy storage unit connected to the antenna for storing high frequency energy which is transferred wirelessly to the transponder and is received on the antenna; and a control and transmission unit for transferring an information signal to the antenna to be transmitted from the antenna using energy stored in the energy storage unit; wherein the antenna comprises at least two separate antenna portions, each one of which is arranged for wireless receiving and transmitting, has a direction in which the efficiency for receiving is at a maximum, works independently of the other antenna portions and is connected to a storage capacitor for storing received high frequency energy, the directions being arranged in angular relation to each other.
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19. A transponder for receiving high frequency energy which is transferred wirelessly to the transponder and for wirelessly transmitting information, the transponder comprising:
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an antenna for receiving and transmitting; an energy storage unit connected to the antenna for storing high frequency energy which is transferred wirelessly to the transponder and is received on the antenna; and a control and transmission unit for transferring an information signal to the antenna to be transmitted from the antenna using energy stored in the energy storage unit; wherein the transponder is arranged to wirelessly transmit information by modulating between two different frequencies. - View Dependent Claims (20, 21, 22)
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Specification