PPI has partnered with Modelithics to provide S-Parameter Data that is currently downloadable free on our website for the following; 0505C/P and 1111C/P series of Hi-Q (>10,000)/Low ESR Capacitors, 0201N, 0402N, 0603N, 0805N and the 1111N series of EIA Hi-Q/Low ESR Capacitors and 1005BB, 0201BB and 0402BB series of Broadband Capacitors.
The CAP-PPI-0201BB-001 is a substrate scalable Global Model™ for the Passive Plus P/N 0201BB surface mount chip capacitor family. They are for use with microstrip applications and account for substrate (or printed circuit board) related parasitic effects up to 65 GHz. The applications require small, SMT devices with low insertion losses and reflections across RF frequencies extending from the tens of KHz to the tens of GHz, and temperatures typically ranging from -55 to +125 0C. 
Passive Plus Inc. (PPI) now offers a line of traditional RF bypass capacitors. These dielectric capacitors can be mounted either horizontally or vertically and are available in 3 case sizes for RF/Microwave applications:
Passive Plus Inc. (PPI) now offers a line of Traditional RF Bypass Capacitors. These dielectric capacitors can be mounted either horizontally or vertically and are available in 3 case sizes for RF/Microwave applications. 0505X series size is .055" x .055" with value range: 470pF to .01µF, 1111X series size .110" x .110" has value range: 4700pF to .1µFF, and the 2225X series .220" x .250" with value range: 0.010µF to 1.0µF.
Passive Plus Inc. (PPI) now provides its customers with the option of specifying capacitor assemblies with SAC 305 solder, which is 100% lead free. Previous to this breakthrough, engineers were limited to specifying capacitor assemblies that typically utilized a high lead based solder to attach the leads to the capacitors. PPI has qualified this lead free solder option to enable engineers to design 100% RoHS compliant capacitor assemblies.
Passive Plus Inc. (PPI) is now offering its 0402BB104 Broadband Capacitors in both 25 and 50 V (WVDC) versions. While the 25 V version typically operates to 35 GHz with an insertion loss < 1.2 dB, the 50 V version’s operating frequency range has been extended to 50 GHz, with a typical maximum insertion loss < 1.2 dB.
Passive Plus Inc. is now offering our 0402BB104 broadband capacitors in both 25- and 50-volt (WVDC) versions. While the 25-volt version typically operates to 35 GHz with an insertion loss < 1.2 dB, the 50-volt version’s operating frequency range has been extended to 50 GHz, with a typical maximum insertion loss < 1.2 dB. These capacitors are intended primarily for coupling RF signals or, occasionally, for bypassing them to ground, while blocking DC. 
Passive Plus Inc. now offers a low ESR/ESL EIA capacitor series. These multi-layer capacitors have been developed for high-Q and microwave applications, exhibit NP0 characteristics and are RoHS compliant. Values range from 0.1 pF to 1000 pF and 25 to 1000 V. Data sheets, along with S-Parameter and modeling data, for each of the case sizes are on the PPI website.
Passive Plus is offering low ESR microwave capacitors in 0201N case size. The 0201N series included value range 0.1pF to 100pF, size .020" x .010", wvdc 25 V, and TC: 0 +/- 30 PPM/°C (-55°C - +125°C) - 0 +/- 60 PPM/°C (125°C - +175°C). Parts are available in tape and reel sizes of 500 pcs or 15,000 pcs. Engineering design kits are also available. The 0201N data sheet, S-Parameter and modeling data are available.