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Harmonic mean rate fairness for cognitive radio networks with heterogeneous traffic

submitted by choll3 15 hours ago

This paper proposes new utility-based fairness criteria for radio resource allocation in underlay cognitive radio networks based on harmonic mean concept. Then, joint rate and power allocation prob...

1 dig(s) Dig it Bury Topic: Communication

Small square monopole antenna having variable frequency band-notch operation for UWB wireless communications

submitted by soltcidor 1 day ago

A novel printed monopole antenna for ultra wide band (UWB) applications with frequency band-notch function is presented.By inserting a vertical H-shaped slot in the ground plane, a new resonance at...

1 dig(s) Dig it Bury Topic: Communication

A CPW-FED planar dual band-notched ultra-wideband antenna by etching an S-shaped SIR slot on the feed line

submitted by pypeAgreede 1 day ago

A novel planar ultra-wideband antenna with 3.6/5.5 GHz dual band-notched characteristics is proposed in this article. By etching an S-shaped step-impedance resonator slot on the feed line, antenna ...

1 dig(s) Dig it Bury Topic: Communication

A multiband antenna with MIMO implementation for USB dongle size wireless devices

submitted by harn 1 day ago

A compact multiband antenna is proposed for future 4G Long-Term Evolution (LTE) wireless devices of USB dongle. The antenna covers LTE band-3 (1710–1880 MHz)/DCS1800 and LTE band-7 (2500–2690 M...

1 dig(s) Dig it Bury Topic: Communication

Proximity study of a conformal UWB directional antenna on water pipe

submitted by iobria 1 day ago

A preliminary study on the conformal properties of an antipodal exponentially tapered antenna placed on the surface of a flow meter system in the UWB range is presented. It was observed that the wa...

1 dig(s) Dig it Bury Topic: Communication

A wideband aperture-coupled microstrip array using backed substrate integrated cavity with T-shaped geometry

submitted by vonisomorebil 1 day ago

A novel 2 × 2 wideband cavity-backed aperture-coupled microstrip array is presented in this article.The cavity in the antenna element is designed based on the new substrate integrated cavity techn...

1 dig(s) Dig it Bury Topic: Communication

A tri-band, small size radio frequency identification tag antenna with U-shaped slots

submitted by doleo3119 1 day ago

A new multiband, small size antenna for passive radio frequency identification (RFID) tags is presented. Placement of three U-shaped slots can create three independent resonances within the RFID ra...

1 dig(s) Dig it Bury Topic: Communication

80–110 GHz MMIC amplifiers using a 0.1-μm GaAs-based mHEMT technology

submitted by nelemo2077 1 day ago

A 80–110 GHz broadband MMIC low noise amplifiers (LNAs) have been developed for W-band passive image sensors.A monolithic microwave integrated circuit (MMIC) LNAs consists of a four-stage single-...

1 dig(s) Dig it Bury Topic: Communication

Simple wideband microstrip ring bandpass filter by utilizing forced harmonic suppression and direct feed line coupling

submitted by BarrettT 1 day ago

A compact wideband microstrip ring bandpass filter is demonstrated in this article by means of forced harmonic suppression of a single square ring resonator with the absence of the feed line coupli...

1 dig(s) Dig it Bury Topic: Communication

Fields produced at any distance by a hertzian dipole

submitted by kojikovac 1 day ago

Exact integral expressions for the electromagnetic fields produced at “any distance,” r, from the center of a Hertzian dipole of height h are derived in this study (it is believed for the first...

1 dig(s) Dig it Bury Topic: Communication

Novel dual-mode patch band-pass filters with slit structures

submitted by FisherEdwi 1 day ago

Novel microstrip band-pass filters using dual-node patch resonators with slit structures are proposed and optimized in this article.By using etched slit defected structures in the square patch reso...

1 dig(s) Dig it Bury Topic: Communication

Compact conventional phone antenna integrated with wideband multiple-input-multiple-output antenna

submitted by gsponske 1 day ago

A compact conventional phone antenna integrated with wideband multiple-input-multiple-output (MIMO) antenna is presented.Within operation band of the MIMO antenna, the effect of mutual coupling bet...

1 dig(s) Dig it Bury Topic: Communication

Antipodal linearly tapered slot antenna using unequal half-circular defected sides for gain improvements

submitted by hinryo23 1 day ago

In this Letter, a new antipodal linearly tapered slot antenna (ALTSA) with unequal half-circular slots (UHCS) embedded on both edge-sides is proposed to improve an antenna gain. The proposed antenn...

1 dig(s) Dig it Bury Topic: Communication

Design considerations for compact microstrip resonant cells dedicated to efficient branch-line miniaturization

submitted by jaja 1 day ago

A conventional compact microstrip resonant cell (CMRC) has been thoroughly investigated to enhance its slow-wave properties and subsequently ensure an efficient miniaturization of a microstrip circ...

1 dig(s) Dig it Bury Topic: Communication

Heterogeneous gigabit orthogonal frequency division multiplexing/radio over fiber transmissions of wired and wireless signals using a reflective semiconductor optical amplifier and single-arm mach–zehnder modulator

submitted by agrihort 1 day ago

We propose and experimentally demonstrate a novel radio over fiber system that provides different gigabit orthogonal frequency division multiplexing (OFDM) signals transmission for wired and wirele...

1 dig(s) Dig it Bury Topic: Communication