This post provides a list of different dielectric materials that can be used in microwave applications. It is hoped more dielectric materials will be added to the list over time. The links along with each material link to more information for each material.
Substrates & Laminates
| Material | Relative Permitivity | Loss Tangent | Links |
| RT/Duroid® 5870 | 2.33 @ 1 MHz 2.33±0.02 @ 10 GHz |
0.0005 @ 1 MHz 0.0012 @ 10 GHz |
[1] |
| RT/Duroid® 5880 | 2.2 @ 1 MHz 2.2±0.02 @ 10 GHz |
0.0004 @ 1 MHz 0.0009 @ 10 GHz |
[1] |
| RT/Duroid® 5880LZ | 1.96±0.04 (8 GHz - 40 GHz) |
<0.0027 @ 10 GHz | [1] |
| Rogers® RO4003C | 3.55 (8 GHz - 40 GHz) |
0.0021 @ 2.5 GHz 0.0027 @ 10 GHz |
[1] |
| Rogers® RO4350B | 3.66 (8 GHz - 40 GHz) |
0.0031 @ 2.5 GHz 0.0037 @ 10 GHz |
[1] |
| Polyflon CuFlon® | 2.05±0.05 @ 18 GHz | 0.00045 @ 18 GHz | [2] |
| Polyflon NorCLAD™ | 2.55±0.05 @ 3 GHz | 0.0011 @ 3 GHz | [2] |
| Polyflon POLYGUIDE™ | 2.32±0.005 @ 10 GHz | 0.0005 @ 10 GHz | [2] |
| Polyflon Copper Clad ULTEM™ |
3.05 @ 3 GHz | 0.003 @ 10 GHz | [2] |
| Rexolite® 1422 | 2.53 (1 MHz - 500 GHz) |
0.00012 @ 1 MHz 0.00025 @ 10 MHz 0.00066 @ 10 GHz |
[3][4] |
| Rexolite® 2200 | 2.62 (1 MHz to 500 GHz) |
0.0004 @ 1 MHz 0.0005 @ 10 MHz 0.0014 @ 10 GHz |
[3][4] |
| Rohacell® 31 HF | 1.05 @ 2.5 GHz 1.04 @ 5 GHz 1.04 @ 10 GHz 1.04 @ 26.5 GHz |
<0.0002 @ 2.5 GHz 0.0016 @ 5 GHz 0.0017 @ 10 GHz 0.0106 @ 26.5 GHz |
[5] |
| Rohacell® 51 HF | 1.06 @ 2.5 GHz 1.06 @ 5 GHz 1.07 @ 10 GHz 1.05 @ 26.5 GHz |
<0.0002 @ 2.5 GHz 0.0008 @ 5 GHz 0.0041 @ 10 GHz 0.0135 @ 26.5 GHz |
[5] |
| Rohacell® 71 HF | 1.07 @ 2.5 GHz 1.106 @ 5 GHz 1.09 @ 10 GHz 1.09 @ 26.5 GHz |
<0.0002 @ 2.5 GHz 0.0016 @ 5 GHz 0.0038 @ 10 GHz 0.0155 @ 26.5 GHz |
[5] |
| P10 Foam™ 48 kg/m3 | 1.04-1.10 @ 10 GHz | <0.00062 @ 10 GHz | [6] |
| P10 Foam™ 128 kg/m3 | ? @ 10 GHz | <0.00196 @ 10 GHz | [6] |
| P10 Foam™ 225 kg/m3 | 1.25-1.36 @ 10 GHz | <0.00282 @ 10 GHz | [6] |
| P10 Foam™ 380 kg/m3 | 1.40-1.73 @ 10 GHz | <0.0039 @ 10 GHz | [6] |
| Teflon® AF 1600 | ~1.93 (1 MHz to 10 GHz) |
0.0001 - 0.0002 (1 MHz to 10 GHz) |
[7][8][9] |
| Teflon® AF 2400 | ~1.9 (1 MHz to 10 GHz) |
0.0001 - 0.0003 (1 MHz to 10 GHz) |
[7][8][9] |
| Eccostock® LoK 2 | 1.7 (60 Hz - 10 GHz) |
0.004 (60 Hz - 10 GHz) |
[10] |
| Eccostock® PP-2 2 | 1.03 (60 Hz - 10 GHz) |
0.0001 (60 Hz - 10 GHz) |
[10] |
| Eccostock® PP-4 2 | 1.06 (60 Hz - 10 GHz) |
0.0001 (60 Hz - 10 GHz) |
[10] |
| Eccostock® 0005 2 | 2.53 (60 Hz - 12 GHz) |
0.0005 (60 Hz - 12 GHz) |
[10] |
| Eccostock® HIK 500F 2 | 3 - 16 ± 3% 1 16 - 30 ± 10% 1 2.54 |
< 0.002 (1 GHz - 10 GHz) 0.0005 (1 GHz - 40 GHz) |
[10] |
| Eccostock® CK 2 | 1.7 - 15 ± 3% 1 (2 GHz - 18 GHz) |
<0.002 (2 GHz - 18 GHz) |
[10] |
| Taconic RF-35TC | 3.5±0.05 @ 10 GHz | 0.0011 @ 10 GHz | [11] |
| Taconic RF-35A2 | 3.5±0.05 @ 1.9 GHz 3.5±0.05 @ 10 GHz |
0.0011 @ 1.9 GHz 0.0015 @ 10 GHz |
[11] |
| Taconic RF-35 | 3.5±0.1 @ 1.9 GHz | 0.0018 @ 1.9 GHz | [11] |
| Taconic RF-35P | 3.5±0.1 @ 1.9 GHz 3.5±0.1 @ 10 GHz |
0.0025 @ 1.9 GHz 0.0034 @ 10 GHz |
[11] |
| Taconic RF-301 | 2.97±0.07 @ 1 MHz 2.97±0.07 @ 1.9 GHz |
0.0012 @ 1.9 GHz | [11] |
| Taconic RF-30 | 3.0±0.1 @ 1.9 GHz | 0.0014 @ 1.9 GHz | [11] |
| Taconic TLF-34 | 3.4±0.07 @ 1.9 GHz | 0.0016 @ 1.9 GHz 0.002 @ 10 GHz |
[11] |
| Taconic TLF-35 | 3.5±0.07 @ 1.9 GHz | 0.0016 @ 1.9 GHz 0.002 @ 10 GHz |
[11] |
| Taconic TLA-6 | 2.62±0.05 (1 MHz - 12 GHz) |
0.0012-0.0021 (1 MHz - 12 GHz) |
[11] |
| Taconic TLC-27 | 2.75±0.05 @ 10 GHz | 0.0022 @ 10 GHz | [11] |
| Taconic TLC-30 | 3±0.05 @ 10 GHz | 0.0028 @ 10 GHz | [11] |
| Taconic TLC-32 | 3.2±0.07 @ 10 GHz | 0.003 @ 10 GHz | [11] |
| GIL GML1000 0.020" | 3.05±0.05 @ 2.5 GHz 3.05±0.05 @ 10 GHz |
0.003 @ 2.5 GHz 0.005 @ 10 GHz |
[12] |
| GIL GML1000 0.030" | 3.2±0.05 @ 2.5 GHz 3.2±0.05 @ 10 GHz |
0.003 @ 2.5 GHz 0.004 @ 10 GHz |
[12] |
| C-STOCK AK/AK-500 | 3-15±5%1 15-25±10%1 |
<0.002 | [13] |
| C-STOCK Low K-34 | 1.7 | <0.004 | [13] |
| C-STOCK Low K-39 | 1.9 | <0.004 | [13] |
| C-STOCK .0005 | 2.54±0.01 | 0.0005 | [13] |
| C-STOCK 265 | 2.5-5 @ 10 GHz 1 | 0.01-0.04 @ 10 GHz | [13] |
| C-STOCK HCN | 3.5 @ 10 GHz | 0.015 @ 10 GHz | [13] |
| C-STOCK RH-5 | 1.09 (2 GHz - 20 GHz) |
0.0004 @ 5 GHz | [13] |
| C-STOCK RH-7 | 1.11 (2 GHz - 20 GHz) |
0.0007 @ 5 GHz | [13] |
| C-STOCK RH-10 | 1.14 (2 GHz - 20 GHz) |
0.0009 @ 5 GHz | [13] |
| C-FOAM PK-2 | 1.04 @ 10 GHz | 0.001 @ 10 GHz | [13] |
| C-FOAM PK-5 | 1.06 @ 10 GHz | 0.001 @ 10 GHz | [13] |
| C-FOAM PF-2 | 1.03 | 0.0001 | [13] |
| C-FOAM PF-4 | 1.06 | 0.0001 | [13] |
1 Controlled Dielectric Constant
2 May have previously been known as Stycast®. Some patents refer to Stycast® materials with the same properties [14][15][16][17]
More dielectric materials from Nelco, Arlon, Taconic and Rogers coming soon...
Adhesives & Bonding Films
| Material | Relative Permitivity | Loss Tangent | Links |
| Polyflon Bonding Film | 2.34 @ 9.5 GHz | 0.002 @ 9.5 GHz | [2] |
| Eccostock® HIK Cement | 3, 4, 6, 10, 15 | 0.01 | [10] |
| Rogers® 3001 Bonding Film | 2.28 (X Band) |
0.003 (X Band) |
[1] |
Here is a list of other sites who have also compiled a list of dielectric materials and their constants:
