| 摘要 |
<p>A directional coupler designed to operate in a predetermined frequency range includes a first electrical conductor (35) of predetermined length and width, a second electrical conductor (33) having the same length as the first electrical conductor, which is narrower than the first electrical conductor and fully underlies or overlies the first conductor. A dielectric is disposed between the first and second conductors. The coupler can further include a slot (53) disposed within the first electrical conductor for reduced coupling values. The above described coupler can be cascaded with narrow conductors coupled to wide conductors and vice versa. By cascading pairs of coupled lines with opposite orientations, the reflection coefficients are maintained nearly identical at all ports.</p> |
