sentences:  Additionally, the H tree forms a space efficient layout for trees in graph drawing, and as part of a construction of a point set for which the sum of squared edge lengths of the traveling salesman tour is large.It is commonly used as a clock distribution network for routing timing signals to all parts of a chip with equal propagation delays to each part, and has also been used as an interconnection network for VLSI multiprocessors.For the same reason, the H tree is used in arrays of microstrip antennas in order to get the radio signal to every individual microstrip antenna with equal propagation delay.