Antenna with a conductive layer and a two-band transmitter including the antenna
First Claim
1. An antenna with a conductive layer and a coupling system which includes a coplanar line formed by two primary coupling slots in a conductive layer of said antenna, wherein said coupling system further includes a slotted line formed by a slot connected to one of said two primary coupling slots and constituting a secondary coupling slot.
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Accused Products
Abstract
The antenna of said transmitter is a microstrip antenna. A rear edge of its patch is provided with a short circuit by means of which a quarter-wave primary resonance can be excited by a coplanar line formed by two coupling slots in an area. Separator slots separate said area from another area in which a secondary resonance can be established at twice the frequency of the primary resonance from a slotted line extending one slot of the coplanar line. The invention applies in particular to the production of a dual-mode mobile telephone to the GSM and DCS standards.
178 Citations
10 Claims
- 1. An antenna with a conductive layer and a coupling system which includes a coplanar line formed by two primary coupling slots in a conductive layer of said antenna, wherein said coupling system further includes a slotted line formed by a slot connected to one of said two primary coupling slots and constituting a secondary coupling slot.
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4. A two-band transmitter including:
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a signal processor adapted to be connected at frequencies in two working bands centered on two respective predetermined center frequencies to send and/or receive an electrical signal in each of said two bands, and an antenna including a plurality of superposed conductive layers to constitute at least one resonant structure and a coupling system and being adapted to be connected to said processor via said coupling system to couple said electrical signal to radiated waves, wherein said coupling system includes a coplanar line formed by two slots facing each other in one of said conductive layers and respectively constituting two coupling slots, said coplanar line couples a resonance of said antenna to said electrical signal, said resonance constitutes a primary resonance and has a primary frequency substantially equal to one of said two center frequencies, and another resonance of said antenna constitutes a secondary resonance having a secondary frequency substantially equal to the other of said two center frequencies, wherein said coupling system further includes a slotted line which is formed by a slot connected to one of said two primary coupling lines and constituting a secondary coupling slot and which couples said secondary resonance to said electrical signal. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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Specification