This paper describes an antenna system combining Global Navigation Satellite System (GNSS) with Iridium satellite communications and UHF 225-512 MHz communications on a handset to provide an integrated Communications Navigation (Comm/Nav) antenna. The GPS/GNSS/Iridium antenna is a folded Quadrifilar Helix Antenna (QHA) with novel features which improve frequency coverage compared to existing QH...

This work presents a unidirectional, co-circularly polarized (CP), printed antenna with highly decoupled or isolated transmit (T x ) and receive (R ports for 2.4 GHz in-band full duplex (IBFD) applications. The presented topology is based on four similar sequentially rotated trimmed patches righ...

Coastal sea level variation as an indicator of climate change is extremely important due to its large socioeconomic and environmental impacts. The ground-based global navigation satellite system (GNSS)-reflectometry (GNSS-R) becoming a reliable alternative for surface altimetry. We investigate the impact antenna polarization orientation on GNSS-R altimetric performance at different carrier freq...

In this paper, a technical concept and design of circular polarization detection patch array antenna using a double-balanced RF multiplier is proposed. The microwave integration technology is effectively employed to realize the proposed array antenna. The double-balanced RF multiplier is integrated with an orthogonal planar array antenna. The array antenna which consists of 12 patch elements an...

This paper presents background information and experiment procedures for an antenna measurement laboratory course to be held in a new anechoic chamber at California Polytechnic State University. The lab consists of five experiments and one design project intended to give students practical experience with antenna measurement techniques and to creatively apply analytical skills to design, constr...

We present a reconfigurable spiral antenna for use in adaptive MIMO systems. The antenna is capable of changing the sense of polarization of the radiated field. It is fabricated by using an RF-MEMS technology compatible withmicrowave laminate substrates developed within the author’s group. The proposed antenna structure is built on a number of rectangular-shaped bent metallic strips interconnec...

A broadband dual circularly polarized (dual-CP) reflectarray based on 3-D printed dielectric materials is proposed in this article. novel array element that enables the linearly polarization (LP) to CP transformation proposed. The unit cell consists of two orthogonal cuboids adjust phases LP waves independently and then combine them into a wave. innovative design provides an extra degree freedo...

A new global positioning system (GPS) antenna is proposed to cover the three GPS bands (L1, L2, and L5, namely 1575, 1227, and 1176 MHz) with the L5 band to be added after 2006. The developed antenna size is only 1 5 1 5 in aperture corresponding to 7 7 ( = free space wavelength) and 13 thick. Quadrature feeding is employed to ensure right-hand circular polarized (RHCP) radiation. The final min...