| 摘要 |
<p>A feeding radiation electrode (21) and a parasitic radiation electrode (22) are provided from the front side face to the upper surface of a dielectric substrate (20), a slit (23) extending inward from the feeding end (25) is formed in the feeding radiation electrode (21) and a slit (24) extending inward from the ground end (26) is formed in the parasitic radiation electrode (22). Furthermore, a branch electrode (27) is formed to extend to the feeding radiation electrode (21) side on the parasitic radiation electrode (22). With such an arrangement, gain is obtained in two frequency bands by utilizing double resonance, i.e. basic resonance and harmonic resonance, by the feeding radiation electrode and the parasitic radiation electrode and return loss characteristics are improved by coupling of harmonic resonance.</p> |
