Aspects of the subject disclosure may include, for example, a transmission system having a coupling device, a bypass circuit, a memory and a processor. The coupling device can facilitate transmission or reception of electromagnetic waves that propagate along a surface of a transmission medium. The memory can store instructions, which when executed by the processor, causes the processor to perform operations including restarting a timer to prevent the bypass circuit from disabling the transmission or reception of electromagnetic waves by the coupling device. Other embodiments are disclosed.

A dual cavity, low power, outdoor combination line amplifier package for cable telecommunication systems is disclosed. It comprises: a dual-cavity main frame, cast in one piece and sectioned into an upper cavity and a lower cavity; a hardline entry cover, having a hardline receptacle PCB with a power supply fixed thereon, electrically and environmentally sealing on one side of the upper cavity; a tap plate cover, having a tap plate PCB fixed thereon and mounted with a plurality of taps, electrically and environmentally sealing on the other side of the upper cavity with the taps facing externally; a gain module heatsink cover, having a gain module PCB and a passive PCB fixed thereon, electrically and environmentally sealing on one side of the lower cavity; and a smart app accessories cover, having a smart access cover PCB fixed thereon, electrically and environmentally sealing on the other side of the lower cavity.

Aspects of the subject disclosure may include, a system that facilitates detecting first electromagnetic waves propagating along a transmission medium are experiencing a first propagation loss, inducing second electromagnetic waves along the transmission medium to mitigate the first propagation loss, detecting that the second electromagnetic waves are experiencing a second propagation loss and inducing third electromagnetic waves along the transmission medium to mitigate the second propagation loss. To reduce radiation losses when transitioning from the first electromagnetic waves to second electromagnetic waves and transitioning from the second electromagnetic waves to the third electromagnetic waves, the system can be further adapted to use differing criteria for each transition. Other embodiments are disclosed.

A dual cavity, low power, outdoor combination line amplifier package for cable telecommunication systems is disclosed. It comprises: a dual-cavity main frame, cast in one piece and sectioned into an upper cavity and a lower cavity; a hardline entry cover, having a hardline receptacle PCB with a power supply fixed thereon, electrically and environmentally sealing on one side of the upper cavity; a tap plate cover, having a tap plate PCB fixed thereon and mounted with a plurality of taps, electrically and environmentally sealing on the other side of the upper cavity with the taps facing externally; a gain module heatsink cover, having a gain module PCB and a passive PCB fixed thereon, electrically and environmentally sealing on one side of the lower cavity; and a smart app accessories cover, having a smart access cover PCB fixed thereon, electrically and environmentally sealing on the other side of the lower cavity.

Aspects of the subject disclosure may include, for example, a waveguide system for detecting a condition that adversely affects a propagation of electromagnetic waves generated by the waveguide system on a surface of the wire, and adjusting characteristics of the electromagnetic waves generated by the waveguide system to reduce adverse effects caused by the condition. Other embodiments are disclosed.

A method for transmitting signals over a power line network, wherein within the power line network at least one transmitter and at least one receiver communicate via at least two channels, each channel including a respective feeding port of at least one transmitter and the respective receiving port of the at least one transmitter and transmitter including at least two feeding ports. The method: determines a channel characteristic of each of the channels; applies a feeding port selection criterion based on the channel characteristic; and selects an excluded feeding port among the at least two feeding ports based on the feeding port selection criterion, wherein the excluded feeding port is not used during further communication. A corresponding power line communication modem can implement the method.

A method for making an electromagnetic band gap structure includes performing a single full wave simulation for the structure using a computer to perform the simulation, extracting a multiple port scattering matrix based on the single full wave simulation using a computer, and measuring or estimating a transmission of waves across the body between a first port and a second port of the body. The body has multiple ports between the first port and the second port that are defined by scattering elements using the computer. The matrix may be reduced to a two by two matrix recursively one dimension at a time using the computer.

A power receiving apparatus includes: a communication circuit that receives a control signal from a power transmitting apparatus through a wired transmission line; a control circuit that determines a propagation time in which the control signal is propagated from the power transmitting apparatus to the power receiving apparatus through the wired transmission line; and a demodulation circuit that receives modulated power from the power transmitting apparatus through a wired transmission line, and demodulates, based on the determined propagation time, the modulated power in synchronization with a phase of the modulated power.

Aspects of the subject disclosure may include, for example, a transmission system having a coupling device, a bypass circuit, a memory and a processor. The coupling device can facilitate transmission or reception of electromagnetic waves that propagate along a surface of a transmission medium. The memory can store instructions, which when executed by the processor, causes the processor to perform operations including restarting a timer to prevent the bypass circuit from disabling the transmission or reception of electromagnetic waves by the coupling device. Other embodiments are disclosed.

The present disclosure includes systems and techniques relating to power line communications (PLC) systems and apparatus. In some implementations, a method includes determining information regarding a potential data rate to be used with a powerline communications (PLC) channel, reducing a bias current or voltage of an analog front end of a PLC transceiver based on the determined information to reduce power consumption of the analog front end of the PLC transceiver, and transmitting or receiving data over the PLC channel with the reduced bias current or voltage of the analog front end of the PLC transceiver.