This paper presents the design of low power modulator and demodulator circuits dedicated to a BFSK transceiver, operating in the 863870 MHZ ISM band. The two circuits were designed using ams 0.35μm technology with 3V dc voltage supply. Simulation results of the new Direct Digital Frequency Synthesizer in the modulation have shown good performances of the designed system as the Spurious Free Dyn...

In this paper, compact antenna has been designed that can be implemented in a 2X2 Multiple-Input MultipleOutput (MIMO) system. A microstrip patch antenna fed by a microstrip line is designed for a frequency of 2.4 GHz used for industrial, scientific and medical (ISM) band applications. Polarization diversity of the two antennas is used to construct independent and uncorrelated signals on each a...

In recent years there has been considerable interest in the development of standards for Wireless Local Area Networks. In particular, IEEE’s 802.11 standard has now been extended to a family of WLAN standards. 802.11a and 802.11g both employ COFDM but operate in different frequency bands. The 802.11g physical layer standard specifies a link adaptive COFDM scheme for operation in the 2.4GHz ISM ...

The gas phase spectrum of the cyclic C18 molecule recorded in the laboratory at a temperature typical of diffuse interstellar clouds is compared with absorption features toward Oph and HD 204827 in the 5730–5934 8 region. For the origin band at 5928.5 8 an upper limit to the column density of 1:8 ; 10 cm 2 is inferred. The origin band pattern in the laboratory spectrum changes on lowering the i...

This paper describes the effects on the data communication of wireless local area network inside the 2.4 GHz ISM band by applying UWB pulses with different pulse repetition rates in a GTEM cell. The effect on the transmission rate has been covered by two different measurement setups. First the general influence on a wireless communication has been investigated. Second the influence on the recei...

In this paper, we report, for the first time, experimental results on channel capacity of heating, ventilation, and air-conditioning (HVAC) ducts based on multi-carrier transmission technique and measured channel frequency responses in the 2.4 GHz Industrial, Scientific, and Medical (ISM) band. Experiments using actual synthesized signals through a building HVAC duct system demonstrate the abil...

This paper proposes a microstrip patch antenna for 2.45 GHz Industrial Scientific Medical (ISM) band Wireless Body Area Network (WBAN) applications. To enhance the front-to-back ratio (F/B) and specific absorption rate (SAR), an electrically coupled LC resonator is introduced. The overall dimensions of the proposed antenna are 54 mm × 45 mm × 2.4 mm and it has a gain of over 1 dBi for the entir...

We present a multiple antenna system for industrial, scientific, and medical (ISM)-band transmission (MASI). The hardware demonstrator was developed and realized at our institute. It enables multiple-input multiple-output (MIMO)-communication applications and is capable of transmiting arbitrary signals using 8 transmit and 8 receive antennas in parallel. It operates in the 2.4GHz ISM-band. The ...

Abstract: An E-shaped patch antenna is designed for ISM band of frequency. The proposed antenna is designed on a flexible substrate. The polyamide having dielectric constant of 4.3 is one of the flexible substrate and used for design of the proposed antenna. Due to the flexibility feature of the substrate this antenna is used as wearable antenna. Simulated and measured results for main paramete...

This paper presents a new design of dual band RFID reader antenna for ISM-band industrial science and medical applications at 2.4 GHz 5.8 GHz. Theantenna is designed physically built using FR4 substrate taking 1.5 thickness, 4.3 relative permittivity 0.025 loss tangents. Different slots havebeen introduced to reduce the dimensions achieve bandfor microwave ISM application. The dimension propose...