Efficient Design Methodology for a Complex DRA-SIW Filter-Antenna Subsystem

Table 4

Comparison with other filter-antenna systems.

Reference	Gain (dBi)	Bandwidth%	Structure type	Transmission zeros
[4]	4.3	4.7	Planar	0
[5]	2.41	16.3	Planar	0
[6]	4.87	5.57	Multilayer planar	0
[8]	2.3	19.16	Planar	2
This work	7.1	4.2	Hybrid planar	2