15 W Power Amplifier Modules Using Coaxial Waveguide Combining by Planar Probes

Suna, Gonca
Eker, Taylan
Akkul, Mustafa
Incebacak, Mustafa
Demir, Şimşek
Yliditim, Nevzat
Power combining in coaxial waveguide by printed planar probes is investigated. Combiners are designed and implemented at 8-12 GHz and 15-18 GHz. Average introduced insertion loss is measured as 0.5 dB per branch. Power amplifier modules are designed and implemented for both bands. similar to 20 W output power at 8-12 GHz and similar to 12 W output at 15-18 GHz are achieved by efficient power combining.
IEEE Antennas-and-Propagation-Society International Symposium (APSURSI)


Frequency tunable microstrip patch antenna using RF MEMS technology
Erdıl, Emre; Topallı, Kagan; Unlu, Mehmet; Aydın Çivi, Hatice Özlem; Akın, Tayfun (2007-04-01)
A novel reconfigurable microstrip patch antenna is presented that is monolithically integrated with RF microelectromechanical systems (MEMS) capacitors for tuning the resonant frequency. Reconfigurability of the operating frequency of the microstrip patch antenna is achieved by loading it with a coplanar waveguide (CPW) stub on which variable MEMS capacitors are placed periodically. MEMS capacitors are implemented with surface micromachining technology, where a 1-mu m thick aluminum structural layer is plac...
Frequency Dependent Dielectric Properties of ZnSe/p-Si Diode
Güllü, Hasan Hüseyin; YILDIZ, DİLBER ESRA (2019-03-01)
The study on electrical and dielectric properties of the ZnSe/p-Si diode have been investigated using admittance measurements in the frequency range of 50 kHz - 1 MHz at room temperature. The experimental values of dielectric constant and dielectric loss are found in decreasing behavior with increase in frequency due to the characteristics of the interface capacitance in the diode and so that the similar behavior was observed in loss tangent. With the contribution of the series resistance, the results of th...
Numerical analysis, design and two port equivalent circuit models for split ring resonator arrays
Yaşar Örten, Pınar; Sayan, Gönül; Department of Electrical and Electronics Engineering (2010)
Split ring resonator (SRR) is a metamaterial structure which displays negative permeability values over a relatively small bandwidth around its magnetic resonance frequency. Unit SRR cells and arrays have been used in various novel applications including the design of miniaturized microwave devices and antennas. When the SRR arrays are combined with the arrays of conducting wires, left handed materials can be constructed with the unusual property of having negative valued effective refractive indices. In th...
Calibration Quality Analysis of Phased Array Antennas
Kilic, Ozgehan; Yalim, Alper; Cetintepe, Cagri; Demir, Şimşek (2012-07-14)
A phased array antenna (PAA) system can be calibrated by using several methods. In general, the aim of this calibration is to guarantee that the systematic errors are diminished. Still there can be residual errors due to the random errors in the system. These residual errors may decrease the correction accuracy of the calibration. This correction accuracy can be quantified as a quality factor. In this paper, quality of the Rotating Electric-Field Vector (REV) calibration method is examined with a statistica...
Electromagnetic shielding effectiveness of galvanostatically synthesized conducting polypyrrole films in the 300-2000 MHz frequency range
Kaynak, A (1996-07-01)
Both far-field (plane wave) and near field shielding effectiveness (SE) measurements have been conducted on electrochemically synthesized conducting polypyrrole(PPy) films with wide ranging conductivity levels (10(-2) S/cm to 45 S/cm). Go-axial transmission line, TEM test cell and TE(10) waveguide techniques were employed to measure shielding effectiveness as a function of polymer conductivity, frequency and temperature. Highly doped polypyrrole films exhibited shielding levels, above 40 dB from 300 MHz to ...
Citation Formats
G. Suna, T. Eker, M. Akkul, M. Incebacak, Ş. Demir, and N. Yliditim, “15 W Power Amplifier Modules Using Coaxial Waveguide Combining by Planar Probes,” presented at the IEEE Antennas-and-Propagation-Society International Symposium (APSURSI), Memphis, TN, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53239.