A silicon carbide substrate includes: an n type drift layer having a first surface and a second surface opposite to each other; a p type body region provided in the first surface of the n type drift layer; and an n type emitter region provided on the p type body region and separated from the n type drift layer by the p type body region. In one embodiment, two encoders are employed in a dual pass encoding system. The expanded mirror may be a half silvered mirror or a phased mirror with a plurality of mesas. In some embodiments, some of the wideband frequency ranges are above 30 MHz. In some embodiments, the stabilizer sheath and shaped guiding catheter may be moved relative to the patient’s body structure and relative to each other so that a desired approach angle may be obtained for the tissue penetration member with respect to the target tissue.