Search results

Items from 1 to 17 out of 17 results

article

A magnetic‐free in‐band full‐duplex RF front‐end with antenna balancing structure

Junhyung Jeong, Girdhari Chaudhary, Yongchae Jeong

International Journal of RF and Microwave Computer‐Aided Engineering > 31 > 6 > n/a - n/a

In this article, a design of magnetic‐free in‐band full‐duplex (IBFD) RF front‐end with antenna balancing structure is presented. The proposed magnetic‐free IBFD RF front‐end consists of 3 dB hybrid couplers, a Wilkinson power divider, two transmitter (Tx) antennas, and two receiver (Rx) antennas. The proposed IBFD RF front‐end can be implemented and integrated at high frequencies because all the...

article

Fully planar frequency independent square Archimedean spiral antenna with impedance transformer for ground penetrating radars

Walid Bousbaa, Hicham Medkour, Farid Bouttout, Zoubeida Messali

Microwave and Optical Technology Letters > 63 > 1 > 295 - 309

An ultra‐wideband unidirectional circularly polarized planar self‐complementary and compact Archimedean square spiral antenna is proposed in this paper. Compared to the conventional center‐fed or vertically‐connected coaxial line spiral antennas, the proposed antenna has a completely planar feed structure. The traditional impedance transformer (balun) in the third dimension is moved to the planar...

chapter

A novel performance-prediction model of subharmonic self-oscillating mixers

Simone A. Winkler, Ke Wu, Andreas Stelzer

2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference > 1 - 4

2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference

In this paper, a novel model for accurately evaluating the performance behaviour of subharmonic self-oscillating mixers (SOM) is presented. This model permits to investigate on the effects of various design parameters of SOMs namely in terms of conversion gain, IF frequency, noise figure, and intermodulation distortion. Such an accurate model is specifically important in the design of millimeter-wave...

chapter

Miniaturized dual-band balanced antenna for LTE using meander lines

I. T. E. Elfergani, Abubakar Sadiq Hussaini, Jonathan Rodriguez, R. A. Abd-Alhameed

2016 13th International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD) > 1 - 4

2016 13th International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)

A new compact dual-band balanced antenna is proposed with meandered lines operating in the LTE bands of 700/2600MHz. It has a compact size with the overall dimensioning of 54×18× 8 mm3, in which can be simply concealed within mobile handsets. Techniques such as meandered lines are used in order to accomplish a well-matching and size reduction of antenna. The meander lines were printed on FR4 substrate...

chapter

A balanced reflection type HMIC vector modulator over 34–36GHz based on cold state pHEMTs

Dongquan Sun, Yanyan Fan, Jinping Xu, Shu Jiang

2015 IEEE International Wireless Symposium (IWS 2015) > 1 - 4

2015 IEEE International Wireless Symposium (IWS)

A vector modulatorat Ka band consisting of two balanced I/Q bi-phase attenuatorsis presented in this paper. The bi-phase attenuators are of reflection type, in which cold state pHEMTs are employed as tunable impedance loads. Due to the balanced structure, parasitic effects of the pHEMTs are effectively cancelled. A prototype of the vector modulator is fabricated by HMIC technique. The measured dynamic...

article

The influence of a balanced structure on the rotation effect of a build-up system

Tieping Wei, Xiaoxiang Yang, Jinhui Yao, Hang Xu

Measurement > 2015 > 61 > Complete > 162-168

The influence of a balanced structure on the rotation effect of a build-up system was investigated using an orthogonal array, which can efficiently reduce the total number of experiments. Based on mechanical analysis, four primary influence factors of the balanced structure were specified, including the thickness, material and shape of the balanced platen, and the height of the bearing outer ring...

article

Design and optimization of a cavity-backed spiral antenna for use in 6–12 GHz band

Gyoo-Soo Chae, Joong-Soo Lim

Journal of Central South University > 2013 > 20 > 7 > 1838-1843

The design and optimization of a self-complementary two-arm Archimedean spiral antenna backed by an absorptive cavity were presented. Parametric studies on the proposed antenna structure were carried out by using CST MWS. Simulation results show that the proper choice of spiral turns and cavity depth can miniaturize the dimensions of the cavity-backed spiral antenna presented here. According to simulation...

article

On balanced Hermitian structures on Lie groups

C. Medori, A. Tomassini, L. Ugarte

Geometriae Dedicata > 2013 > 166 > 1 > 233-250

We present several methods for the construction of balanced Hermitian structures on Lie groups. In our methods a partial differential equation is involved so that the resulting structures are in general non homogeneous. In particular, we prove that for 3-step nilpotent Lie groups G of dimension 6, any left-invariant complex structure on G admits a balanced Hermitian metric. Starting from normal almost...

article

Innovative approaches in relation to the balanced structure of enterprise commodity assortment formation

T. Maksimova, O. Zhdanova

Teka Komisji Motoryzacji i Energetyki Rolnictwa > 2010 > 10D

chapter

Partial Scan Approach for Secret Information Protection

M. Inoue, T. Yoneda, M. Hasegawa, H. Fujiwara

2009 14th IEEE European Test Symposium > 143 - 148

2009 14th IEEE European Test Symposium (ETS)

This paper proposes a secure scan design method which protects the circuits containing secret information such as cryptographic circuits from scan-based side channel attacks.The proposed method prevents the leakage of secret information by partial scan design based on a balanced structure. We also guarantee the testability of both the design under test and DFT circuitry, and therefore, realize both...

article

Integrated Receiver Based on a High-Order Subharmonic Self-Oscillating Mixer

S.A. Winkler, Ke Wu, A. Stelzer

IEEE Transactions on Microwave Theory and Techniques > 2007 > 55 > 6-2 > 1398 - 1404

In this paper, a novel integrated receiver front-end at 5.8 GHz using a high-order subharmonic balanced self-oscillating mixer (SOM) with a high conversion gain of 11.1 dB is presented, to the authors' knowledge, for the first time. SOMs are excellent choices for a low-cost receiver design as both the oscillating source and the mixer are combined in one single device. Moreover, the presented structure...

chapter

A Novel Balanced Third and Fourth Harmonic Self-Oscillating Mixer with High Conversion Gain

Simone Winkler, Ke Wu, Andreas Stelzer

2006 European Microwave Conference > 1663 - 1666

Proceedings of the 36th European Microwave Conference

In this paper, a third and fourth harmonic FET self-oscillating mixer (SOM) operating at 5.8 GHz and 7.6 GHz, respectively, with high measured conversion gain (8.75 dB) is presented for the first time to the authors' knowledge. The proposed structure is fully balanced to provide inherent RF-LO isolation and suppression of harmonics and AM noise, but it does not require complex and space-intensive...

chapter

A Novel Balanced Third and Fourth Harmonic Self-Oscillating Mixer with High Conversion Gain

S.A. Winkler, Ke Wu, A. Stelzer

2006 European Conference on Wireless Technology > 368 - 371

Proceedings of the 9th European Conference on Wireless Technology

chapter

Self-Oscillating Mixing Technique and its Application to Low-Cost Receiver Architectures

Simone Winkler, Ke Wu, Andreas Stelzer

2006 Canadian Conference on Electrical and Computer Engineering > 684 - 687

2006 Canadian Conference on Electrical and Computer Engineering

Self-oscillating mixers (SOMs) are an excellent choice for low-cost modern receiver architectures, because both the oscillating source and the mixer are combined in one single device. Moreover, subharmonic operation reduces LO frequency requirements and therefore provides a very good choice for millimeter-wave systems. In this paper, a fully-balanced SOM structure at high harmonics with high conversion...

article

Design of a Millimeter-Wave CMOS Radiation Oscillator With an Above-Chip Patch Antenna

M. Sasaki

IEEE Transactions on Circuits and Systems II: Express Briefs > 2006 > 53 > 10 > 1128 - 1132

This brief presents a design method of a millimeter-wave CMOS radiation oscillator for broadband short-range communication. An above-chip patch antenna is proposed for the radiation oscillator. The proposed antenna has a balanced port, which makes it suitable for the direct connection of CMOS cross-coupling transistors. The properties of the antenna are analyzed by an electromagnetic field solver,...

article

Sequential Circuits with Combinational Test Generation Complexity under Single-Fault Assumption

Michiko Inoue, Emil Gizdarski, Hideo Fujiwara

Journal of Electronic Testing > 2002 > 18 > 1 > 55-62

We show that the test generation problem for all single stuck-at faults in sequential circuits with internally balanced structures can be reduced into the test generation problem for single stuck-at faults in combinational circuits. In our previous work, we introduced internally balanced structures as a class of sequential circuits with the combinational test generation complexity. However, single...

article

Zrównoważone formy funkcjonowania miasta i jego otoczenia (przegląd współczesnych koncepcji)

A. Górka

Architektura Krajobrazu > 2002 > nr 1-2 > 36-46

The aim of the work is a critical review of special conceptions when balancing the surroundings of a city. The characteristics of the models: "compact city, urban village, New urbanism, perm- culture, jurisdiction, city in a rural enclave and two architectonical and city-planning structures which build a city tissue" have been generally presented. The idea of balancing a city reminds us...

Filter options

Publication date

Last 3 years (2)

Close

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

From:

To:
Set your own date range

INFONA - science communication portal

Search results

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Publication type

Publication language

Keywords

Data set

Reporting an error / abuse

Sending the report failed

Accessibility options