A new method for finding the dielectric parameters of biological substances is presented. The method makes use of the loss-tangent as a function of frequency to identify the dominating relaxation process. The method was tested for a few cell suspensions (blood and lymphocytes) and two tissues (live
Measurement of the permittivity and loss tangent of dielectric sheets
✍ Scribed by William R. Humbert; Waymond R. Scott Jr.
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 110 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
✦ Synopsis
4. CONCLUSION
We present a method-of-moments-based analysis of different helical antennas. The dielectric coating effect and finite ground planes are taken into account. A simple method is described for transforming a printed quadrifilar helical antenna into an equivalent wire structure, allowing numerical analysis of this cost-effective printed wire antenna. Theoretical results are found to be in a good agreement with experimental results.
📜 SIMILAR VOLUMES
The complex permitti¨ity of low-loss dielectric materials ( ) ABS and graft polymer in the 94 GHz band is measured using the free-space method. The ¨alidity of the free-space method at 94 GHz is confirmed, and the data of the complex permitti¨ity of these materials are presented.
Recently, a new structure called photonic crystals has been recei¨ing much attention. Applications ha¨e appeared in the fields of optic, microwa¨es, and antennas. In this paper, the effect of the ¨ariation in the dielectric constant for a two-dimensional photonic crystal is analyzed.