A surface mount type antenna includes a loop-shaped fed radiation electrode provided on a substrate, and a non-fed radiation electrode is arranged close to the fed radiation electrode with a gap provided therebetween. In an enhanced embodiment, temperature compensation is also possible, and detection may be confirmed via an independent electromagnetic or other sensor. AC breakover conduction displays are embodied in both small, tightly-integrated configurations as well as, large area discrete implementations. A common line of intersection is formed at the point of intersection in space. The connecting rod 7 is connected to the second connecting portion P2 and the ram 6.