Adder

Unit delay

Gates count

Beam combiners

Polarization converters

TSD

DESIGN1

7

36

14

14

DESIGN2

4

24

26

12

DESIGN3

2

11

9

9

QSD

DESIGN1

8

54

20

18

DESIGN2

4

27

8

17

MSD

DESIGN2

4

10

11

7