This paper presents simple current controlled current mode first order phase shifter based on a modern active building block for analog signal processing, namely current differencing transconductance amplifier (CDTA). The proposed phase shifter consists of only single CDTA and one grounded capacitor. Any lump resistor component is not required thus it is possible to suit for IC implementation. ...

With the aim of achieving constant insertion loss, this paper presents the design of a 24 GHz reflectivetype phase shifter (RTPS) integrated with a switched -attenuator for phased array transmitters. Three RTPS circuits with hybrid coupler and capacitive-type reflective loads are cascaded to obtain required phase-shift. Accumulation-mode MOS (AMOS) varactors are used as reflective loads for pha...

We present a novel, inexpensive and non-interferometric technique to retrieve phase images by using a liquid crystal phase shifter without including any physically moving parts. First, we derive a new equation of the intensity-phase relation with respect to the change of refractive index, which is similar to the transport of the intensity equation. The equation indicates that this technique is ...

Purpose – The demand for higher bandwidth has resulted in the development of mm-wave phased array systems. This paper explores a technique that could be used to feed the individual antennas in a mm-wave phased array system with the appropriate phase shifted signal, to achieve required directivity. It presents differential Colpitts oscillators at 5 GHz and 60 GHz that can provide differential ou...

-A lumped element 180 Wilkinson divider consisting of 11 elements was presented in 2003. It used a conventional Wilkinson divider, a -90 and a +90 phase shifter of πand T-type. In this paper, that of 10 elements is newly presented. Frequency characteristics of the two 180 Wilkinson dividers and those of a rat-race divider known as an out of phase circuit are discussed. Key-Words: Wilkinson divi...

This article presents an equivalent electrical circuit for designing Radio-Frequency MEMS-controlled planar phase shifter. This kind of phase shifters has recently been incorporated in reconfigurable reflectarrays. The proposed equivalent circuit depends on the number, the ON/OFF state and the locations of the switches inside the unit cell. Such equivalent circuit is used for determining, with ...

A V-band CMOS-MEMS switchable phase shifter based on reflection-type topology is presented in this work. Phase shifter is simulated by using CMOS process. Three discrete phase states are achieved at 65GHz by using Bi-directional fishbone actuators. The measured insertion is very less and the return loss is also better than 14 dB over the 55-65GHz frequency range. It demonstrates a great potenti...