Reconfigurable Ring Filter with Controllable Frequency Response

Figure 12

(a) Layout of the electronically reconfigurable ring bandpass filter using four Skyworks SMV 1800 varactors for impedances 𝑍_𝑟=80 Ω, 𝑍_𝑜𝑒=75 Ω, and 𝑍_𝑜𝑜=30 Ω; (b) photo of fabricated filter.

(a)

(b)