The first demonstration of a printed antenna remote unit (ARU) for optically distributed mobile communications compliant with the 1.9-GHz PCN specifications is presented. The ARU consists of a cavity-backed printed antenna with appropriate RF and photonic circuitry. The ARU is low cost, compact, robust, and can be easily positioned in typical microcell/picocell sites. A summary of the design pr...

Tracking a specific person is one of the important tasks of mobile service robots. This paper describes a novel and reliable strategy for detecting and tracking a specific person by a mobile robot in outdoor environments. The robot uses 3D LIDARs for person detection, and identification and a directivity-variable antenna (called ESPAR antenna) for locating a specific person even under occluded ...

This paper compares measurement with prediction of ITU-R Recommendation P.1546. This recommendation mainly depends on propagation curves which are based on the measurement result. The basic field strength is derived from the curve corresponding to transmitting antenna height, frequency and required distance and then correction factor is added to this. There are two important correction values i...

The develpoment of smart antennas for mobile phones has recently recevied much interest due to compact size of multimode phones and requirements to keep the amount of RF power absorbed by a user below a certain level. In this paper a new Yagi Uda shaped frequency reconfigurable antenna for multimode mobile applications has been presented. The proposed fabricated antenna have return loss better ...

In mobile radio reception, signals typically arrive at the receiver antenna from a wide range of directions due to multipath propagation. This can be described by a direction-of-arrival (DoA) distribution of the propagation environment. If the DoA distribution is known, the Doppler spectrum and the autocorrelation function can be directly computed [1]. Furthermore, handset antenna performance c...

this paper presents an approach to modeling of field penetration and gives contribution to understanding the real effects of the fields and the sensitivity of human model to electromagnetic radiation generated by mobile antenna. when a human body is exposed to the electromagnetic radiation, because human body contain 70% of liquid, and it contain more liquid near of head, heart, abdomen (near o...

The new services of mobile broadband system can deal with the growth of mobile internet traffic and high data rate. Long Term Evolution (LTE) is one of the prospective solutions to future mobile broadband systems. In this paper, a novel antenna is presented with Split Ring Resonator (SRR) loading suitable for LTE in handheld devices. The radiating element is Planar Inverted FAntenna (PIFA) cons...

This paper derives a physicalstatistical land mobile-satellite/HAP propagation channel model that can predict joint statistical time series and power-spatial-delay profile data in a multi-antenna mobile, multi-satellite scenario, and is compared with published measurement data. The model is then used to estimate the required satellite and HAP antenna separation to achieve an uncorrelated Satell...

Digital Audio Broadcasting (DAB) is a digital method of delivering radio services from base station to the receiver. The main aim of this paper is to get better reliability of DAB reception in mobile (moving) environment. DAB is very forceful in mobile environment, but in some situations, reception fails in certain spots due to undesired audio interruptions. Antenna diversity systems are consid...

Background: Infertility is defined as inability to conceive after a year of sexual intercourses without the use of contraceptives. In half of the cases the causative factor is the male. Males are exposed to the effect of various environmental factors, which may decrease their reproductive capabilities. Phone electromagnetic power is very small, only a few hundredths of a microwave oven, but bec...