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Miniapolis (talk | contribs) m →Filters and impedance matching: Fixes |
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{{main|Distributed element filter}}
[[File:Microstrip Hairpin Filter And Low Pass Stub Filter.jpg|thumb|alt=See caption|upright=1.3|Microstrip [[band-pass]] hairpin filter ''(left)'', followed by a [[low-pass]] stub filter]]
Filters are a large percentage of circuits constructed with distributed elements. A wide range of structures are used for constructing them, including stubs, coupled lines and cascaded lines. Variations include interdigital filters, combline filters and hairpin filters. More-recent developments include [[fractal]] filters.<ref>Cohen, p. 220.</ref> Many filters are constructed in conjunction with [[dielectric resonator]]s.<ref>{{multiref| Hong & Lancaster, pp. 109, 235.|Makimoto & Yamashita, p. 2.}}
As with lumped-element filters, the more elements used, the closer the filter comes to an [[brickwall filter|ideal response]]; the structure can become quite complex.<ref>Harrell, p. 150.</ref> For simple, narrow-band requirements, a single resonator may suffice (such as a stub or [[spurline filter]]).<ref>Awang, p. 296.</ref>
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