Passive Components

Novel Microstrip Band-stop Filters Based on Complementary Split Ring Resonators

In this article, the stop-band characteristics of complementary split ring resonators (CSRR) and their applications to microstrip band-stop filters are proposed. The equivalent circuit model of a unit CSRR is applied to explain its characteristics and ...
In recent years, there has been a growing interest in electromagnetic bandgap structures (EBG), which exhibit the properties of rejecting electromagnetic waves at certain frequencies. The most interesting applications for these structures are the filtering of frequency bands or the suppression of undesired spurious passbands and harmonics in microwave...
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A Novel Wideband Transition Between a Conductor-backed Finite Ground CPW and a Microstrip Line

This article describes a transition between a conductor-backed coplanar waveguide (CPW) and a microstrip line, which provides a very low loss alternative to a standard microstrip-to-coplanar line transition at higher frequencies. This simple topology i...
Microstrips (MS) and coplanar waveguides (CPW) are two of the main waveguide structures used in higher frequency applications, because of their compatibility with monolithic fabrication and solid-state devices. In CPW, the signal lines and ground planes are placed on one side of the substrate, permitting a circuit consisting of...
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Surface-mount Coaxial Relays

Product Feature:

Surface-mount Coaxial Relays

Amphenol RF, Danbury, CT

Amphenol RF has developed several high power microwave relays for applying directly to a printed circuit board (PCB) utilizing the SMT process. These designs enable the user to move from a frame-mounted package design necessitating a labor-intensive final assembly into the supporting product. In addition to the physical mounting of these earlier designs, hand soldering of the solenoid power leads was required as well as cabling of the NC/C/NO contacts to the main PCB.


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Design of Bias Tees for a Pulsed-bias, Pulsed-RF Test System Using Accurate Component Models

In this article, a design of custom bias tees to be used in a pulsed-bias, pulsed-RF measurement system is described. The bias tee design is such that the DC path allows bias pulses to pass through to the device unchanged, while still allowing RF measu...
This article describes the design of a bias tee for a pulsed-bias, pulsed-RF test system. The cut-off frequency of the DC path was raised to allow pulsing of the bias signal. The theory of bias tee design for pulsed measurements is first presented. The simulation results for the design...
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Novel Low Pass Filters Using a Defected Microstrip Structure

In this article, the stop-band characteristics of a novel defected microstrip structure (DMS) are studied and its application to a low pass filter is proposed. The equivalent circuit model of the unit defected microstrip structure is used to explain th...
A novel defected microstrip structure (DMS), which behaves in a way similar to the known defected ground structure (DGS) unit cell, 1–10 is studied in this article. The unit DMS 3,4 is made by etching slots in the microstrip line, which then exhibits the property of rejecting microwaves at...
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Rigorous Analytical Expressions for the Electromagnetic Parameters of Rectangular Coaxial Couplers with Circular and Square Inner Conductors

<p>This article presents a set of accurate closed-form formulas for the primary parameters (inductance [L] and capacitance [C] matrices) and the impedances (Z<span class="storybodysubscript">oe</span>, Z<span class="storybodysubscript">oo</span>) of th...
The electrical properties of a loss-less coupler, using TEM mode coupled lines, can be described in terms of even- (Z oe ) and odd- (Z oo ) mode impedances and its primary parameters [L] and [C] matrices 2 where L o and C o are the proper inductance and...
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A Dual-band Branch-line Coupler Using Quasi-composite Right/Left-handed Transmission Lines

A quasi-RH/LH dual-band 3 dB branch-line coupler (BLC) constructed in microstrip form is proposed. The designed BLC circuit replaces the conventional chip inductors in the coupler arms with microstrip stubs for easier circuit integration and lower fabr...
Branch-line couplers (BLC) are widely used as 90° signal dividers in microwave and millimeter-wave circuits. A BLC can provide two quadrature-phased signals from a single local oscillator for use in image rejection mixers. 1 It can be used as part of the feeding network for antennas to produce circularly...
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