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.
BMI values less than 18.5 kg/mÂ² are considered underweight. BMI values from 18.5 kg/mÂ² to 24.9 kg/mÂ² are healthy. Overweight is defined as a body mass index of 25.0 to less than 30.0 kg/mÂ². People with BMIs in this range have an increased risk of type 2 diabetes, hypertension, and cardiovascular disease. Obesity is defined as a BMI of 30.0 kg/mÂ² or greater.