Bandwidth Enhancement of a Backfire Microstrip Patch Antenna for Pervasive Communication

Table 2

Data sheet of different substrates.

Properties	LTCC	FR4 Epoxy	RT Duroid
Dielectric constant	7.4	4.36	2.2
Loss tangent	0.023	0.019	0.0004
Breakdown voltage	20–28 kv	55 kv	>60 kv