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) is an established measure utilized by physicians and health experts to determine weight status (i.e. underweight, overweight or within a healthy weight range). Use this calculator to find out what your BMI can tell you about your health and well-being. What BMI ranges mean. Experts generally consider a BMI below 20 to be underweight and a BMI of 20 to 25 to be healthy. BMIs of 25 to 30 are generally considered overweight, while a BMI over 30 is generally considered very overweight (obese).