DUAL ANTENNA DISTRIBUTED FRONT-END RADIO
First Claim
1. An apparatus for wireless communications, comprising:
- first and second power amplifiers (PAs) for amplifying signals for transmission;
a transmit antenna for transmitting the amplified signals;
a receive antenna for receiving other signals to be processed in a receive path; and
a first transmit filter configured to filter the amplified signals from the first PA before amplification by the second PA.
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Accused Products
Abstract
Certain aspects of the present disclosure provide a dual antenna distributed radio frequency front end (RFFE). RFFE topologies described herein may provide lower insertion loss (IL), reduced emission mask, decreased power consumption, and/or lower noise figure (NF) compared to conventional RFFE topologies. One example apparatus for wireless communications generally includes first and second power amplifiers (PAs) for amplifying signals for transmission, a transmit antenna for transmitting the amplified signals, a receive antenna for receiving other signals to be processed in a receive path, and a first transmit filter configured to filter the amplified signals from the first PA before amplification by the second PA. For certain aspects, a divided inter-stage filter providing overlapping frequency bands may be utilized. For certain aspects, the RFFE may support frequency-division duplexing (FDD)/TDD (time-division duplexing) coexistence, including support for FDD/TDD MIMO (multiple input multiple output).
66 Citations
69 Claims
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1. An apparatus for wireless communications, comprising:
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first and second power amplifiers (PAs) for amplifying signals for transmission; a transmit antenna for transmitting the amplified signals; a receive antenna for receiving other signals to be processed in a receive path; and a first transmit filter configured to filter the amplified signals from the first PA before amplification by the second PA. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. An apparatus for wireless communications, comprising:
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a receive antenna for receiving signals; a transmit antenna for transmitting other signals processed in a transmission path; first and second low noise amplifiers (LNAs) for amplifying the signals received by the receive antenna; and a first receive filter configured to filter the amplified signals from the first LNA before amplification by the second LNA. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. An apparatus for wireless communications, comprising:
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a first driver amplifier (DA) for amplifying signals for transmission; a transmit filter for filtering the amplified signals from the first DA; a first power amplifier (PA) for amplifying the filtered signals from the transmit filter; a first diplexer configured to frequency-domain multiplex inputs to first and second ports onto a third port, wherein the first port receives the amplified signals from the first PA; a first antenna coupled to the first PA via a first diplexer; and a second antenna coupled to a receive path via a second diplexer. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69)
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Specification