The main parameters of the filter (DefiniTIons)

1. Center Frequency: The center frequency f0 of the filter passband is generally f0=(f1+f2)/2, and f1 and f2 are bandpass or band-stop filters. The left and right sides are relatively lowered by 1dB or 3dB. Frequency. The narrowband filter often calculates the passband bandwidth with the minimum insertion loss as the center frequency.

2. Cutoff Frequency: refers to the right-frequency point of the passband of the low-pass filter and the left-band of the passband of the high-pass filter. It is usually defined by a 1 dB or 3 dB relative loss point. The reference for relative loss is: low-pass is based on the insertion loss at DC, and high-pass is based on the insertion loss at a sufficiently high passband frequency where no parasitic stopband is present.

3. Passband Bandwidth (BWxdB): (below) refers to the spectrum width to be passed, BWxdB=(f2-f1). F1 and f2 are the left and right frequency points corresponding to the insertion loss at the center frequency f0 and the corresponding X (dB). The filter passband bandwidth parameters are usually characterized by X=3, 1, 0.5, ie BW3dB, BW1dB, BW0.5dB. FracTIonal bandwidth = BW3dB / f0&TImes; 100%, also commonly used to characterize the filter passband bandwidth.

4. Insertion loss (InserTIon Loss): The loss due to the introduction of the filter to the original signal in the circuit, characterized by loss at the center or cutoff frequency, such as the requirement for full-band interpolation loss.

5. Ripple: refers to the peak-to-peak value of the insertion loss as a function of the frequency on the loss mean curve in the range of 1dB or 3dB bandwidth (cutoff frequency).

6. Passband Riplpe: The amount of insertion loss in the passband as a function of frequency. The in-band ripple within the 1 dB bandwidth is 1 dB.

7. In-band standing wave ratio (VSWR): An important indicator of whether a signal in the passband of a filter is well matched. Ideal match VSWR = 1:1, VSWR > 1 for mismatch. For an actual filter, the bandwidth satisfying VSWR<1.5:1 is generally less than BW3dB, and its ratio to BW3dB is related to filter order and insertion loss.

8. Return Loss: The number of decibels (dB) of the ratio of the input power of the port signal to the reflected power, which is also equal to |20Log10ρ|, and ρ is the voltage reflection coefficient. The return loss is infinite when the input power is fully absorbed by the port.

9. Resistance band suppression: an important indicator to measure the performance of the filter selection. The higher the indicator, the better the suppression of out-of-band interference signals. There are usually two ways to do this: one is to suppress how many dB for a given out-of-band frequency fs, and the calculation method is the attenuation amount As-IL at fs; the other is to propose that the amplitude-frequency response of the filter is close to the ideal rectangle. The degree of the index - rectangular coefficient (KxdB > 1), KxdB = BWxdB / BW3dB, (X can be 40dB, 30dB, 20dB, etc.). The more the order of the filter, the higher the degree of rectangle - that is, the closer K is to the ideal value 1, the greater the difficulty of production.

10. Delay (Td): refers to the time required for the signal to pass through the filter. The value is the derivative of the diagonal frequency of the transmission phase function, ie Td=df/dv.

11. In-band phase linearity: This indicator characterizes the phase distortion introduced by the filter for the transmitted signal in the passband. Filters designed with linear phase response functions have good phase linearity, but have poor frequency selectivity and are limited to pulsed, or phase-modulated signal transmission system applications.

2.0mm Female Pin Header

2.0mm (0.079") Pitch Female Headers

Overview

2.00 mm pitch female sockets/headers are low-profile connectors designed for signal and low power PC board connections when space is at a premium. Options include through-hole, surface mount and can be customized for mixed technology, press-fit and pass-through terminations. The pins and blades are available in various sizes, counts, amperages, and plating.

Communications

Through-Hole (Poke-In)
Best used for high-reliability products that require stronger connections between layers.
Aerospace and military products are most likely to require this type of mounting as these products experience extreme accelerations, collisions, or high temperatures.
Useful in test and prototyping applications that sometimes require manual adjustments and replacements.
2.0mm vertical single row female header, 2.0mm vertical dual row female header, 2.0mm right-angle single row female header and 2.0mm right-angle dual row female header are some examples of Antenk products with through-hole mount type.

Surface-Mount
The most common electronic hardware requirements are SMT.
Essential in PCB design and manufacturing, having improved the quality and performance of PCBs overall.
Cost of processing and handling is reduced.
SMT components can be mounted on both side of the board.
Ability to fit a high number of small components on a PCB has allowed for much denser, higher performing, and smaller PCBs.
2.0mm Right-angle Dual Row female header, 2.0mm SMT Single row female header and 2.0mm SMT Dual row female header are Antenk`s SMT female headers.

Soldering Temperature for 2.0mm Pitch Female Headers
Soldering SMT female connectors can be done at a maximum peak temperature of 260°C for maximum 60 seconds.

Orientation/Pin-Type: Vertical (Straight) and Right-Angle
2.0mm pitch female headers may be further classified into pin orientation as well, such as vertical or straight male header or right-angle female header.
Vertical or Straight Female Header Orientation
One side of the series of pins is connected to PCB board in which the pins can be at a right-angle to the PCB surface (usually called "straight" or [vertical") or.

Right-Angle Female Header Orientation
Parallel to the board's surface (referred to as "right-angle" pins).
Each of these pin-types have different applications that fit with their specific configuration.

PCB Connector Stacking
For 2.0mm pitch female headers, the orientation is either offered as vertical or right-angle, which are options. Elevated sockets/female headers can be available upon request.

Profile Above PCB
This type of configuration is the most common way of connecting board-to-board by a connector. First, the stacking height is calculated from one board to another and measured from the printed circuit board face to its highest insulator point above the PCB.

Elevated Sockets/Female Headers
Elevated Sockets aka Stacked sockets/receptacles or Mezzanine are simply stacked female headers providing an exact distance requirement between PCBs that optimizes electrical reliability and performance between PCB boards.

Choosing this type of stacking configuration promotes the following benefits:
Connector Isolation - the contacts are shrouded preventing cable connection mishaps and good guidance for the mating header connectors.
For off-the-shelf wireless PCB module, stacking height is optimized with elevated sockets.
Offers superior strength and rigidity.
Polarisation prevents users from inverted insertion.

Single, Dual or Multiple Number of Rows
For a 2.0mm straight or vertical female header, the standard number of rows that Antenk offers ranges from 1 to 2 rows. However, customization can be available if 3, 4 or n number of rows is needed by the customer. Also, the number of contacts for the single row is about 2-40 pins while for dual row, the number contacts may vary from 2-80 pins.

Pin Material
The pins of the connector attached to the board have been designed with copper alloy. With customer`s demand the pins can be made gold plated.

Custom 2.0mm Pitch Female Headers
Customizable 2.0 mm pitch female headers are also available, making your manufacturing process way faster as the pins are already inserted in the headers, insulator height is made at the right size and the accurate pin length you require is followed.
Parts are made using semi-automated manufacturing processes that ensure both precision and delicacy in handling the headers before packaging on tape and reel.

Tape and Reel Packaging for SMT Components
Antenk's SMT headers are offered with customizable mating pin lengths, in which each series has multiple number of of circuits, summing up to a thousand individual part number combinations per connector series.
The tape and reel carrier strip ensures that the headers are packaged within accurately sized cavities for its height, width and depth, securing the headers from the environment and maintaining consistent position during transportation.
Antenk also offer a range of custom Tape and reel carrier strip packaging cavities.

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ShenZhen Antenk Electronics Co,Ltd , https://www.atkconnectors.com