Antenna amplifier
AssigneeLG Products AB
InventorsKrister Andreasson, Mattias Nystrom, Farshid Ghasemzadeh
Life of this patent
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Abstract
An antenna amplifier utilizes integrated dual duplex filters having a first filter branch for allowing through a transmitter band (Tx) between an uplead and an antenna, a second filter branch (Rx1) for allowing through a receiver band (Rx) from the antenna to an output element (3), a third filter branch for allowing through the receiving band (Rx) from an input element (4) to the uplead, and a low noise amplifier whose input is connected to the output element and whose output is connected to the input element. The low noise amplifier (LNA) is preferably both constructed and connected by means of filter-technical and circuit board-technical methods.
Claims19
An antenna amplifier comprising:
- an antenna connection;
- a transmitter connection connected to said antenna connection via a first bandpass filter for transmitter frequencies;
- a receiver frequency amplifier comprising an output for connection to a receiver and a receiver frequency amplifier input connected to said antenna connection via a second bandpass filter;
- said first and second bandpass filters being mounted in a common, elongated cavity and including comb-line-type resonators arranged generally in rows along a cavity mean line;
- and
- connection pins at each of two mutually approaching ends of said first and second bandpass filters and at each of two outer ends of said antenna amplifier.
An antenna amplifier for an antenna intended for transmission in a first frequency band and for receiving in a second frequency band which is different from the first frequency band, comprising:
- an antenna connection;
- a transceiver connection;
- a filter means for providing a first frequency-separated conductor path for the first frequency band extending from said transceiver connection to said antenna connection and a second frequency-separated conductor path for the second frequency band extending from said antenna connection to said transceiver connection;
- said second conductor path including a low noise amplifier;
- said first conductor path including a first resonator-constructed bandpass filter, for the first frequency band intended for transmission, immediately connected between said transceiver connection and said antenna connection;
- said second conductor path including a second bandpass filter, said second bandpass filter comprising a first end connected immediately to one end of said antenna connection;
- and
- a third bandpass filter comprising a first end immediately connected to said transceiver connection,
- said low noise amplifier having an input connected to a coupling or inputting element at a second end of said second bandpass filter and having an output connected to a coupling or inputting element at a second end of said third bandpass filter,
- wherein the pass bands of said second and third bandpass filters correspond to the second frequency band.
An antenna amplifier having an antenna connection, a transmitter input connected to the antenna connection via a first transmitter frequency bandpass filter, and an input to an amplifier for receiver frequencies connected to said antenna connection via a second receiver frequency bandpass filter, said amplifier having an output that can be connected to a receiver, wherein the bandpass filters are comb-line filters whose resonators are accommodated in a curved cavity defined by a metal casing, the amplifier is constructed in a circuit board in accordance with microstrip or stripline technology and has an input adaptively connected via a connecting pin embodied at right angles to the circuit board;
- and a connecting pin is provided at respective ends of the cavity.
Dependencies are inferred from the claim text.