Microwave filter and a telecommunication antenna including it
First Claim
1. A microwave filter including a transmission microstrip, at least one lateral microstrip connected to said transmission microstrip, at least two dielectric resonators, and means coupled to said at least two dielectric resonators for resonating with said at least two dielectric resonators and for attenuating an undesired frequency of signals transmitted by said transmission microstrip,said means comprising at least one lateral microstrip extending, over its entire length, only transversely to said transmission microstrip.
9 Assignments
0 Petitions
Accused Products
Abstract
A microwave filter includes at least two dielectric resonators, a transmission microstrip, and at least one lateral microstrip constituting a branch connected to the transmission microstrip. Each lateral microstrip is coupled to at least one dielectric resonator to resonate therewith. The filter is compact and can therefore be incorporated into the housing of a microwave antenna, in particular a multiband antenna for mobile telephone networks.
7 Citations
11 Claims
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1. A microwave filter including a transmission microstrip, at least one lateral microstrip connected to said transmission microstrip, at least two dielectric resonators, and means coupled to said at least two dielectric resonators for resonating with said at least two dielectric resonators and for attenuating an undesired frequency of signals transmitted by said transmission microstrip,
said means comprising at least one lateral microstrip extending, over its entire length, only transversely to said transmission microstrip.
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2. A microwave filter including a transmission microstrip, at least one lateral microstrip connected to said transmission microstrip, and at least two dielectric resonators, and wherein said at least one lateral microstrip is coupled to said at least two dielectric resonators so that it can resonate with said at least two dielectric resonators, and
wherein plural lateral microstrips form a series of U-shapes, two successive U-shapes having a common branch.
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7. A microwave filter including a transmission microstrip, at least one lateral microstrip connected to said transmission microstrip, and at least two dielectric resonators, and wherein said at least one lateral microstrip is coupled to said at least two dielectric resonators so that it can resonate with said at least two dielectric resonators,
wherein said filter includes at least three lateral microstrips connected to said transmission microstrip, and at least two dielectric resonators respectively placed between a first and a second lateral microstrip and between the second lateral microstrip and a third lateral microstrip.
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8. A microwave antenna including radiating elements and at least one microwave filter in a common chassis or housing,
said filter including a transmission microstrip, at least one lateral microstrip connected to said transmission microstrip, and at least two dielectric resonators, and wherein said at least one lateral microstrip is coupled to said at least two dielectric resonators so that it can resonate with said at least two dielectric resonators.
Specification