An apparatus includes multiple signal paths for signal transmission, and control circuitry. The multiple signal paths include a first signal path and a second signal path. The first signal path is configured to convert a digital baseband signal to a first radio frequency (RF) signal having a first frequency and a first gain. The second signal path is configured to convert a digital baseband signal to a second RF signal having a second frequency and a second gain, wherein the second gain is less than the first gain. The control circuitry is coupled to the plurality of signal paths and is configured to receive one or more control signals to enable selective activation of at least one signal path of the plurality of signal paths.

A technology is described for a time division duplex (TDD) repeater with network protection. The TDD repeater can comprise a first port, a second port, and one or more amplification paths coupled between the first port and the second port. The TDD repeater can comprise a signal detector configured to measure a received signal power for a downlink (DL) signal in a first set of one or more TDD DL subframes. The TDD repeater can be further configured to adjust an uplink (UL) noise power or gain of the one or more amplification paths based on the received signal power for the DL signal in the first set of the one or more TDD DL subframes.

An network of wireless RF repeaters includes a first communication device and a second communication device. The first communication device obtains a plurality of radio frequency (RF) signals corresponding to different communication protocols from a plurality of communication systems. A frequency of each of the plurality of RF signals is upconverted to a different frequency, which introduces a phase noise in the plurality of RF signals. The plurality of RF signals corresponding to different communication protocols are merged into a mmWave RF signal of a specified frequency and a defined pilot tone is inserted into the mmWave RF signal. The second communication device captures the mmWave RF signal having the defined pilot tone over-the-air. At least one RF signal is down converted to a source frequency and the phase noise in the one extracted RF signal is reduced concurrently based on a reference of the defined pilot tone.

Technology for a repeater is disclosed. The repeater can include a first port and a second port. The repeater can include a transmitter communicatively coupled to the first port and a receiver communicatively coupled to the second port. The transmitter can transmit a path loss signal. The receiver can receive the path loss signal transmitted by the transmitter. The repeater can include a controller. The controller can identify a first power level of the signal transmitted from the transmitter. The controller can identify a second power level of the signal received at the receiver. The controller can determine an antenna feedback path loss of the repeater based on the first power level and the second power level. The controller can set a maximum gain level for the repeater based on the antenna feedback path loss to avoid an oscillation in the repeater.

A repeater may comprise: a first member; and at least one pattern formed on the first member and configured to provide at least one of an electric field and a magnetic field, which is incident from a wireless power transmitter onto a first surface of the first member, through a second surface of the first member, opposite to the first surface.

Embodiments of a communications system with multiple active scattering devices to service multiple users either indoor or outdoor over same spectrum in a communication network and a method for the system are generally described herein. Signals streams for transmission to users in spoke-and-hub configurations will utilize multiple active scattering devices. Three categories of operational concepts are presented: (1) multiple scattering devices arranged geometrically bundled together to function as active mirrors or retro-directive repeaters, (2) distributed man-made scattering devices placed to enhance channel bandwidth in between a hub and a common service area via frequency re-use, and (3) organizing distributed active scattering devices by remote beamforming for servicing a small common coverage area indoor or outdoor with enhanced bandwidth. All three techniques are for service with enhanced bandwidth and angular resolutions via frequency reuse, and extended service range via coherent operations of scattering devices.

A technology is described for a time division duplex (TDD) repeater with network protection. The TDD repeater can comprise a first port, a second port, and one or more amplification paths coupled between the first port and the second port. The TDD repeater can comprise a signal detector configured to measure a received signal power for a downlink (DL) signal in a first set of one or more TDD DL subframes. The TDD repeater can be further configured to adjust an uplink (UL) noise power or gain of the one or more amplification paths based on the received signal power for the DL signal in the first set of the one or more TDD DL subframes.

A repeater system includes a first repeater device to receive a first beam of radio frequency (RF) signal from a first network node, and a second repeater device to receive a second beam of RF signal from the first network node. The first repeater device synchronizes and controls the second repeater device to concurrently provide the first beam and the second beam of RF signal to a second network node. A plurality of measurements associated with network nodes and repeater devices is acquired. A plurality of signal parameters is selected at the first and second repeater devices for a first beam and a second beam of RF signal, respectively, such that a cross-leakage of first beam on the second beam of RF signal and vice-versa at the second network node is reduced and the gain and a phase of first beam and the second beam of RF signal is adjusted.

Apparatus and methods for signal boosters for vehicles are provided. In certain embodiments, a vehicle signal booster system includes an interior unit including a mobile station antenna that receives an RF uplink signal and transmits a boosted RF downlink signal. The vehicle signal booster system further includes a top unit including a base station antenna that receives an RF downlink signal and transmits a boosted RF uplink signal. The vehicle signal booster system further includes booster circuitry that generates the boosted RF downlink signal based on amplifying one or more downlink channels of the RF downlink signal, and that generates the boosted RF uplink signal based on amplifying one or more uplink channels of the RF uplink signal. The booster circuitry is implemented in the top unit or in the top unit and the interior unit.

A technology is described for a bi-directional amplifier remote monitoring system. A directional coupler can have a first port, a second port, and a third port. The first port can be configured to be coupled to a bi-directional amplifier first port. The second port can be configured to be coupled to a server antenna port. The third port can be configured to be coupled to a wireless modem. The directional coupler can be configured to direct a downlink signal with a selected amount of attenuation from the bi-directional amplifier first port to the wireless modem. The directional coupler can be configured to direct a modem signal with the selected amount of attenuation from the wireless modem to the bi-directional amplifier first port for communication on an uplink path of the bi-directional amplifier.