Abstract: A communication system communicates data elements on a conducting wire. In an embodiment, a sequence of data elements to be transmitted is electrically represented on a pair of terminals, and a transmission element located at a first portion of the conducting wire transmits the sequence in the form of a wave on a surface of the conducting wire. The transmission element includes a first conductor wrapped around the first portion of the conducting wire, a first insulator located between the first conductor and the first portion of the conducting wire, and a conductive structure disposed around the first conductor. The conductive structure has a narrow cross section at one end and extends outwardly to a broader cross section at the other end. A first terminal of the pair of terminals is electrically connected to the first conductor and the second terminal is electrically connected to the conductive structure.

Abstract: A wave launcher may include a printed circuit board (PCB) that includes a pin that receives a radio frequency (RF) signal. The wave launcher may include a cylinder configured to be electrically coupled to the pin and define an opening. The cylinder may receive the RF signal from the pin, form a transition from coplanar to Goubau line structure with a plate, and generate the surface wave. The wave launcher may include an insulator configured to be physically positioned within the opening and between the cylinder and a power line. The insulator may mechanically isolate the cylinder from the power line and permit the cylinder to launch the surface wave on the power line. The wave launcher may include the plate electrically coupled to a pad and may provide a reference for the pin and the cylinder. The pin and the cylinder may be physically positioned proximate the plate.

Abstract: A communication system communicates data elements on a conducting wire. In an embodiment, a sequence of data elements to be transmitted is electrically represented on a pair of terminals, and a transmission element located at a first portion of the conducting wire transmits the sequence in the form of a wave on a surface of the conducting wire. The transmission element includes a first conductor wrapped around the first portion of the conducting wire, a first insulator located between the first conductor and the first portion of the conducting wire, and a conductive structure disposed around the first conductor. The conductive structure has a narrow cross section at one end and extends outwardly to a broader cross section at the other end. A first terminal of the pair of terminals is electrically connected to the first conductor and the second terminal is electrically connected to the conductive structure.

Abstract: Enteric coated stable oral pharmaceutical composition of acid unstable drug. The enteric coating is a bilayer with a pH gradient across its thickness comprising an inner layer of neutral or near neutral pH 7-7.5 and an outer layer of acidic pH 2-6. Also process for preparng the enteric coated stable oral pharmaceutical composition of acid unstable drug. The enteric coating is first carried out at neutral or near neutral pH of 7-7.5 to form an inner layer of neutral or near neutral pH and then at acidic pH of 2-6 to form an outer layer of acidic pH.