And that's exactly what it is: a RF Power Combiner simply combines (sum) different signals in a single output. In the above case, the signals are transmitted over port B and C go out through that output (A).
The body mass index (BMI) or Quetelet index is a value derived from the mass (weight) and height of an individual. The BMI is defined as the body mass divided by the square of the body height, and is universally expressed in units of kg/m 2, resulting from mass in kilograms and height in metres.
body mass index (BMI) the weight in kilograms divided by the square of the height in meters, a measure of body fat that gives an indication of nutritional status.cardiac index cardiac output corrected for body size.n adults, a BMI greater than 30 kg/m 2 indicates obesity; a BMI greater than 40 kg/m 2 indicates morbid obesity; and a BMI less than 18.5 kg/m 2 indicates a person is underweight. The lowest overall death rate is found in people with a BMI of 20 to 24.9 kg/m 2. See also: index.