---
title: The Advantages of Knowles Precision Devices’ Broadband Capacitors
description: Knowles Precision Devices’ Broadband Milli-Cap® is the ideal single-piece construction surface mount capacitor for broadband applications up to 50 GHz
---

[Knowles Precision Devices Blog](https://blog.knowlescapacitors.com/blog)

# [The Advantages of Knowles Precision Devices’ Broadband Capacitors](https://blog.knowlescapacitors.com/blog/the-advantages-of-knowles-precision-devices-broadband-capacitors)

 Written by [Cheriyan Perumal](https://blog.knowlescapacitors.com/blog/author/cheriyan-perumal) | May 3, 2023 12:15:00 PM

High-speed broadband and fiber optic devices used across a variety of communication and military and aerospace applications require circuits that couple RF signals. Since this involves removing the DC component and allowing only the high-frequency AC component to pass or bypass, this can be a complicated process. The blocking capacitor needs to present a near reflectionless transition at the frequency the line is seeing and at a bandwidth that allows the entire signal to pass without degradation. 

While there are a number of broadband blocking capacitors on the market today, many struggle to provide low insertion loss over a broad frequency range. But not Knowles Precision Devices’ Broadband Milli-Cap® capacitor. Milli-Cap is designed to be the ideal single-piece construction surface mount (SMT) capacitor for broadband applications up to 50 GHz (most competitors only support up to 40 GHz). Milli-Cap’s voltage rating is the highest in the market while also offering the lowest insertion loss (see Figure 1).

*Figure 1. This insertion loss plot shows two different Milli-Cap capacitors operating reliably up to 50 GHz.*

Milli-Cap comes in three case sizes, which is the most options available for a high-performance SMT broadband blocking capacitor (Figure 2).

*Figure 2. This chart shows the dimensions of the three different Milli-Cap capacitor offerings and a diagram of a Milli-Cap capacitor. *

Milli-Cap capacitors at each of these three case sizes are constructed using a variety of Class I and Class II dielectric materials depending on the temperature needs of the application. Milli-Cap is also orientation insensitive, which means there is no wrong way to attach the capacitor to your assembly. Additionally, Milli-Cap capacitors can be attached to a soft or hard substrate using a conductive epoxy or solder.

To summarize, the key features of our broadband Milli-Cap blocking capacitors are as follows:

- 0201, 0402, and 0602 footprints
- Low-loss, High Q
- Very low series inductance
- Ultra-high series resonance
- Matches typical 50Ω line widths
- Behaves like an ideal capacitor
- Single-piece construction
- Orientation insensitive

In addition to our Broadband Milli-Cap blocking capacitors, we also offer another ultra broadband DC blocking option – [Opti-Cap](https://www.knowlescapacitors.com/Products/Capacitors/Broadband-Blocks/Ultra-Broadband/Opti-Cap%C2%AE), which provides an even broader frequency range than Milli-Cap from 16 KHz to 50 GHz. 

Learn more about [broadband Milli-Cap](https://www.knowlescapacitors.com/Products/Capacitors/Broadband-Blocks/Ultra-Broadband/Milli-Cap%C2%AE) or explore purchasing options through [DigiKey](https://www.digikey.com/en/product-highlight/k/knowles-dielectric-labs/milli-cap-broadband-blocking-capacitors) or the [SLC Design Engineering Kit available through RFMW](https://www.rfmw.com/products/detail/slcdesignkit-knowles-dli/629517/?pid=). 

Avoid issues with overheating – [learn more about recommended attachment methods for Milli-Cap capacitors.](https://www.knowlescapacitors.com/getattachment/7c1c0e8c-4c59-4724-a53a-0147168ef5b2/Milli-Cap%C2%AE)

[View full post](https://blog.knowlescapacitors.com/blog/the-advantages-of-knowles-precision-devices-broadband-capacitors)

```json
{
  "@context" : "http://schema.org",
  "@type" : "BlogPosting",
  "author" : {
    "@type" : "Person",
    "name" : "Cheriyan Perumal"
  },
  "dateModified" : "2023-05-26T13:25:48.179Z",
  "datePublished" : "2023-05-03T12:15:00Z",
  "headline" : "The Advantages of Knowles Precision Devices’ Broadband Capacitors",
  "image" : {
    "@type" : "ImageObject",
    "height" : 627,
    "url" : "https://info.knowlescapacitors.com/hubfs/Mili-Cap%20Knowles%20Preview%20Image.png",
    "width" : 1200
  },
  "mainEntityOfPage" : "https://blog.knowlescapacitors.com/blog/the-advantages-of-knowles-precision-devices-broadband-capacitors",
  "publisher" : {
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject",
      "height" : 60,
      "url" : "/hs/hsstatic/content_shared_assets/static-1.4092/img/default-amp-logo.png",
      "width" : 60
    },
    "name" : "Knowles Precision Devices Blog"
  }
}
```